Donald Trump is about to get his first challenger for the GOP presidential nomination in 2024: Nikki Haley. Politico reports that Haley — the former South Carolina governor and ambassador to the United Nations — is expected to announce her presidential candidacy on Feb. 15. Her candidacy is something of a surprise, as she once said she would never run against Trump. Now? "It's bigger than one person," she told Fox News. "And when you're looking at the future of America, I think it's time for new generational change." Who is Nikki Haley, and what are her chances of actually being the Republican nominee? Here's everything you need to know:  Who is Nikki Haley? Haley is the daughter of Indian immigrants. (Her birth name was Nimrata Nikki Randhawa.) Her parents built a gift and clothing shop where she started keeping the books as a teenager. "My mom built a successful business. My dad taught 30 years at a historically Black college. And the people of South Carolina chose me as their first minority and first female governor," Haley said at the 2020 Republican National Convention. She was elected governor of South Carolina in 2011 — the first woman and first ethnic minority to hold the post — where she oversaw the removal of the Confederate battle flag from state capitol grounds after the massacre at a Charleston African Methodist Episcopal church in 2015. In 2017, President Trump made her America's ambassador to the United Nations. She left the post at the end of 2018. What's Haley's case for being president? She's calling for generational change. "I don't think you need to be 80 years old to go be a leader in D.C.," she said in that Fox News interview, a clear reference to the advanced ages of both President Biden and former President Trump. NBC News points out that Haley has a number of credentials: A former governor with national security experience who is the "rare member of Trump's cabinet who didn't get mired in scandal or controversy." And she benefits from her link to South Carolina, which holds one of the earliest — and most influential — presidential primaries. But in the battle for the GOP nomination, she may have one significant shortcoming: "She appears to have no calling card in the GOP culture wars" like Trump and another likely presidential contender, Florida Gov. Ron DeSantis (R). Why is Haley running against Trump? Trump seems to be wondering the same thing. Business Insider reports that after news emerged of Haley's likely candidacy, Trump shared an April 2021 video of her saying she wouldn't run against him in 2024. "I would not run if President Trump ran," Haley said at the time. So what changed? Time points out that Haley has a rather complicated history with Trump — "sharply critical" of him during the 2016 primaries, but then pivoting to serve in his administration. After the Jan. 6 insurrection, she suggested that Trump's political career was over: "I think he's lost any sort of political viability he was going to have." But then she flipped back a year later, telling The Wall Street Journal that "we need him in the Republican Party." Now she's running against him — but sought his blessing first. "I talked to her for a little while, I said, 'Look, you know, go by your heart if you want to run,'" Trump said. "She's publicly said that 'I would never run against my president, he was a great president.'" Is anybody else running? Not yet. The New York Times points out that the GOP presidential field has been slow to materialize: Nobody wants to take on Trump directly, "wary of becoming a sacrificial lamb on Mr. Trump's altar of devastating nicknames and eternal fury." Some possible candidates seem to hope that the justice system — prosecutors in New York or Georgia, perhaps — will take care of their Trump problem for them. In any case, there are a number of other prominent GOP names floating around as possible candidates. DeSantis is considered most likely, but Bloomberg reports that other possibilities include former Vice President Mike Pence, former Secretary of State Mike Pompeo, Sen. Tim Scott (R-S.C.), Virginia Gov. Glenn Youngkin (R), and several other governors.  What are Haley's odds of winning the GOP nomination? Not great at the moment. CNBC points out one recent poll showing that Trump leads a potential GOP primary field with 48 percent of the vote — while Haley comes in at just 2 percent. But the presidency may not be the real prize for Haley. New York's Ed Kilgore says there is a  "perception that she's really running for vice-president." (There were reports in 2020 that she was under consideration to replace Pence as Trump's VP pick.) The vice presidency might be "an acceptable consolation prize," Kilgore writes. After all, she's only 51. There are still a lot of possible presidential races in her future.

President Joe Biden is fine-tuning his argument for reelection in an intensive stretch of travel and fundraising, homing in on the newly powerful House GOP as a threat to the rebounding economy as the pieces of his expected campaign come together.

House Republicans have launched an investigation into the discovery of documents with classified markings at an office President Biden used after serving as vice president, and at his Wilmington, Delaware, private residence. Biden's personal lawyers discovered the papers and handed them over to the National Archives. Rep. James Comer (R-Ky.), chair of the House Oversight Committee, sent a letter to the White House on Sunday demanding visitor logs for Biden's home, saying in a letter to White House chief of staff Ron Klain that without a list of visitors "the American people will never know who had access to these highly sensitive documents."  The White House deflected the request, saying the government doesn't keep logs of who visits presidents' private homes. Attorney General Merrick Garland has appointed a special counsel to look into Biden's handling of the two small sets of documents. Another special counsel is investigating former President Donald Trump's storage of classified files at his Mar-a-Lago residence in Florida, after repeated requests that he return them. Sen. Debbie Stabenow (D-Mich.) was among Biden's fellow Democrats who have said the recent revelations were "embarrassing" for Biden, who once called Trump's stash of classified material "just totally irresponsible." Has Biden put Trump in the clear, and altered the outlook for a possible rematch between the political rivals in the 2024 presidential election?  Biden's woes are a gift to Trump There's "one big political winner" in Biden's classified document fiasco, says David Smith in The Guardian, and that's Donald Trump. "Biden's offense is seen by analysts as significantly less grave than his predecessor's," partly because Trump stubbornly refused to hand over his secret documents, and Biden appears not to have even known they were there. Still, "White House reporters, who have endured lean times since the wildly norm-busting Trump presidency, have seized on the day-by-day revelations like hungry lions." The case undeniably "dealt an unexpected blow to Biden as approval ratings were rising" and inflation, a key concern of voters, had started slowing. Republicans, experts in "whataboutism," surely will hammer Biden over this issue, the way they harangued Hillary Clinton about her private email server in 2016. Biden has thrown "a lifeline to Trump, whose 2024 presidential election campaign made a wretched start." This does't change Trump's 'legal jeopardy' This hardly lets Trump off the hook, say Donald Ayer, Mark S. Zaid, and Dennis Aftergut in The Atlantic. There is "only the most superficial parallel" between the Biden and Trump document cases. Biden might have broken the law by "having classified documents in unsecure, nongovernmental settings," but his mistake appears unintentional. Plus, his lawyer discovered them and promptly "returned them to the government without a request." "The current state of facts strongly suggests that Biden's errors are not criminal."  "The contrast with Trump is stark." The National Archives had to ask Trump to return his missing secret documents, in May 2021. It got 15 boxes of material in January 2022, and Trump's lawyers signed a sworn affidavit in June saying they had handed over everything covered under a grand jury subpoena. Then a court, presented with "evidence that the lawyer's statement was likely false," approved a search warrant, and FBI agents seized "upwards of 11,000 documents from Mar-a-Lago, including "more than 70 documents marked 'Secret' or 'Top Secret.'" Willfully retaining national-defense documents violates the Espionage Act. Biden's embarrassing predicament won't end the potentially disqualifying "legal jeopardy" Trump and his team face. The document scandal derailed the Biden train just as it got going The revelations about the discovery of these documents abruptly ended "Joe Biden's best two months since becoming president," says Matthew Continetti in the Washington Free Beacon. "Biden has been on a winning streak since last November when Democrats avoided a midterm meltdown and the Republican Party lapsed into divisive recriminations." Meanwhile, Republicans stumbled through an "embarrassing" fight over the House speakership. Democrats were gearing up to portray "Trump and the MAGA movement as extremist threats to democracy in 2024," but now it's going to be a lot harder for Biden to win over fence-sitting voters by claiming that he and his fellow Democrats are the only ones competent enough to run the federal government. Biden has made it easier for the GOP to "shake off the dust from the speaker's fight" and launch investigations against him and the dealings of his son, Hunter Biden. "The document drama exposes Biden as a hypocrite. It brings him down to earth just as he was beginning to take off." Actually, the special counsel could help Biden This has "been embarrassing, politically, for the Biden White House, which has handled the matter pretty badly," says Michael Tomasky in The New Republic. Right-wing "demagogues" are already having a field day. "Docugate" is clearly "a political problem for Biden in the short term: Republicans will make a lot of noise, and the White House, because the matter is under investigation, won't really be able to respond." But the only way this turns into a disaster for Biden in the "long term" is the unlikely emergence of "evidence of genuine wrongdoing on Biden's part." The most likely scenario is that once "the facts come out, people will see that the reality of the situation has nothing to do with the 'reality' the Republicans are attempting to describe." We've all seen this spectacle before. A story breaks, and "conservatives go into full attack mode." Anyone recall when Barack Obama was "supposed to be doomed" by his association with Jeremiah Wright? "Anyone remember Whitewater?" Liberals, as always, think "it's curtains," but they should put away the "smelling salts." "Most voters, given enough time, can see reality for what it is and make distinctions between Biden's behavior here and Trump's."

NPR's Politics Podcast team discusses the Democratic Party's plan to reshuffle its presidential primary calendar. Enacting the plan is easier said than done.