It's a tall order for Haley as South Carolina prepares to vote on Saturday.
Trump's 2016 primary win helped cement his front-runner status, and he boasts support from all of the state's top elected leaders and all but one of its congressional Republicans.
“We should make sure we tell our partners it’s in their best interest to hold their own weight," Haley said Sunday.
She said "Trump did it by saying he was going to encourage Putin to invade our allies.
But over the weekend, Haley also made an appeal to South Carolinians who typically vote in Democratic primaries, for Saturday's vote.
Persons:
— Nikki Haley, Donald Trump, Haley, “, ” Haley, Russia “, it’s, Trump, Putin, ”, Xi Jinping, Vladimir Putin, Haley “, “ What’s, ___ Meg Kinnard
Organizations:
COLUMBIA, South Carolina Republican, Trump, Trump's United Nations, NATO, Fox News, Associated Press, Democratic
Locations:
South Carolina, Columbia, Russia, America, Charleston, Iowa, New Hampshire