The former South Carolina governor said Sunday that she has "never lost a race."
Trump's endorsement remains the most powerful in the GOP, but "political winds can change quickly," pushing politicians to "act accordingly."
Haley "can't run away from confronting President Trump," a Republican strategist told Newsweek.
The former U.N. ambassador is backing a South Carolina candidate the ex-president hopes to see defeated in the midterms.
"We're still late to the game," she warned. "It's not too late now, but we've got to get on the ball."
Nikki Haley argued on Sunday that Russia's invasion of Ukraine "never would have happened" if Trump was still president.
"Every athlete needs to know when they put their flag on, you're standing for freedom or you're standing for human rights abuses," the former U.N. ambassador said.
President Joe Biden's promise to name a Black woman to the Supreme Court has already drawn complaints the nominee could be unqualified.
Haley warned that China would be looking closely at how Biden deals with the threat of Russia invading Ukraine.
The award will be presented at the Patriot Dinner hosted by The Citadel Republican Society, which claims to be "the largest Republican club in the South."
More than a dozen other GOP lawmakers recently signed a letter supporting a demand that President Joe Biden undergo such a test.
More than 80 percent of Republican voters continue to view the former president favorably, the poll results show.
Former President Donald Trump is a top contender for the GOP nomination for president, although he hasn't committed to running, yet.
The former ambassador to the United Nations said she doesn't want the Republican Party going back to the "days before Trump."
Joe Biden is expected to determine whether to extend the August 31 deadline of full military withdrawal from the central Asian country in the next few hours.
"Doing so would bring the United States even lower while raising up a regime that deserves nothing," Haley wrote in an op-ed.
Bush is facing backlash from some Republicans who say she's a hypocrite for employing a private security detail while advocating for defunding the police.
Trump railed against a former ally and a former member of his administration for being "disloyal" and "killed by the party."
"(Hint: [She's] still not at the border)," reads Haley's mocking meme tweet.
Haley said only weeks ago that the GOP "shouldn't have followed" the former president and suggested Trump would not be able to run in 2024.
If Haley is correct in predicting that the Republican Party will move away from Trump, strategists say her recent break with the former president will bode well for her 2024 campaign.
The former South Carolina governor and UN ambassador—the Indian-American daughter of immigrants—could offer "Trumpism without Trump" and be a fearsome challenger to Kamala Harris.
Haley has been talked about as a possible future Republican candidate for the presidential nomination.
"You can't play both sides anymore Governor. Pick Country First or Trump First," the Illinois Republican congressman tweeted.
The former ambassador to the U.N. said: "He went down a path he shouldn't have, and we shouldn't have followed him, and we shouldn't have listened to him. And we can't let that ever happen again."
The former UN ambassador told Fox News anchor Laura Ingraham that "what happened on January 6 was not great."
Sanders released a video of Republicans expressing fears the "socialist" will soon chair the Senate Budget Committee.
However, in what may become just a two-party, binary battle of turnout in 2024, Trump only holds the support of between 1 and 2 percent of Democrats.