Haley, 52, however, stopped short of an official endorsement. Haley, who once served as Trump's United Nations ambassador, was the last of his major rivals to drop out of the party primary contest, in early March

"I will be voting for Trump," Haley said on Wednesday in response to a question during her appearance at the Hudson Institute, a top conservative think-tank in the American Capital, as she delivered a speech on national security and foreign policy

"As a voter, I put my priorities on a president who's going to have the backs of our allies and hold our enemies to account, who would secure the border, no more excuses; a president who would support capitalism and freedom; a president who understands we need less debt, not more debt," she said

"Trump has not been perfect on these policies. I've made that clear many, many times. But (Joe) Biden has been a catastrophe. So, I will be voting for Trump. Having said that... I stand by what I said in my suspension speech," she said

Haley was born Nimarata Nikki Randhawa in Bamberg, South Carolina, to immigrant Sikh parents from Amritsar, Punjab. Haley is the first Indian-American to serve in a presidential cabinet

Haley said she has "no regrets" about her Republican primary bid: "We left it all on the field"

She also thanked the primary voters who have continued to back her even after she withdrew from the race, a potential warning sign for Trump. And she reiterated the call she'd made when exiting the race in March for the former president to reach out to those voters

"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. I genuinely hope he does that," Haley said in response to the question

Anti-Trump Republican voters largely coalesced behind Ms Haley's presidential bid earlier this year and her dormant candidacy is still picking up support more than two months after she left the race