Republican presidential hopeful Nikki Haley, UN ambassador under former US president Donald Trump, went after her ex-boss and 2024 rival Ron DeSantis on Sunday over their refusal to say whether they want Ukraine to win its war against Russia.
In recent town hall events, Mr Trump, the favourite for the Republican presidential nomination, said that he wanted the war to end, but that he would help Ukraine and Russia negotiate a settlement.
Florida governor Ron DeSantis, Mr Trump's nearest rival for the Republican nomination, said recently that he supports a settlement to the war, and that he hopes fighting will end by the time the next president takes the oath of office in January 2025.
Ms Haley, the only woman in the race for the Republican nomination, lambasted Mr DeSantis for saying this year that Ukraine was a "territorial dispute", a comment that drew widespread criticism and that he has since walked back.
"For them to sit there and say that this is a territorial dispute - that's just not the case, or to say that we should stay neutral," Ms Haley told voters in the early nominating state of Iowa during a televised CNN town hall event.
"It's in the best interest of our national security for Ukraine to win," she added.
Ukraine is an issue that divides Republicans, because of an isolationist streak among many of the party's primary voters.
Crowded Republican field
Ms Haley, 51, a former South Carolina governor, declared her White House bid in February but finds herself in a crowded Republican field that will reach double digits this week with the entrance of more contenders, including former vice president Mike Pence.
Mr Trump dominates the field among potential Republican primary voters with 49 per cent support. Mr DeSantis is next with 19 per cent. There is a yawning chasm between them and the rest of the field, including Ms Haley; she has just 4 per cent support, according to the latest Reuters/Ipsos opinion poll conducted in May.
Ms Haley and many of her rivals polling in single digits are trying to differentiate themselves from Mr DeSantis, in the hope that he stumbles, and they can become the main alternative to Mr Trump.
But some have also begun to criticise Mr Trump himself, after months of shrinking away from attacking the former president out of a fear of alienating his hardcore supporters.
On Sunday she also criticised Mr Trump for congratulating North Korean leader Kim Jong Un last week after the country was elected to the executive board of the World Health Organisation. Mr Trump has also praised the North Korean leader in the past.
"Kim Jong Un is a thug," Ms Haley said. "I don't think we should congratulate dictators."
Mr Trump also took fire from Mr DeSantis and Mr Pence over congratulating Kim, in separate weekend events in Iowa, the state that kicks of the nominating battle next year.
