Haley says she will vote for Trump in November despite their disputes
But Haley also made it clear that she feels Trump has work to do to win over voters who supported her during the course of the primary campaign and continue to cast votes for her in ongoing primary contests.
"I will be voting for Trump," Haley, Trump's former U.N. ambassador, said during an event at the Hudson Institute in Washington.
"Having said that, I stand by what I said in my suspension speech," Haley added. "Trump would be smart to reach out to the millions of people who voted for me and continue to support me and not assume that they're just going to be with him. And I genuinely hope he does that."
The comments in her first public speech since leaving the race are another signal of the Republican Party's virtually complete consolidation of support behind Trump, even from those who have labeled him a threat in the past.
Haley shuttered her own bid for the Republican nomination two months ago but did not immediately endorse Trump, having accused him of causing chaos and disregarding the importance of U.S. alliances abroad as well as questioning whether Trump, 77, was too old to be president again.
Trump, in turn, repeatedly mocked her with the nickname "Birdbrain," though he curtailed those attacks after securing enough delegates in March to become the presumptive Republican nominee.
Trump's campaign did not immediately respond to a request for comment on Haley's announcement.
President Joe Biden's campaign, meanwhile, has been working to win over her supporters, whom they view as true swing voters. Biden's team is quietly organizing a Republicans for Biden group, which will eventually include dedicated staff and focus on the hundreds of thousands of Haley voters in each battleground state, according to people familiar with the plans but not authorized to discuss them publicly.
But Haley made several criticisms of Biden's foreign policy and handling of the U.S.-Mexico border in her speech Wednesday at the Hudson Institute, a conservative Washington think tank she recently joined as she reemerges in the political realm.