Donald Trump and Ron DeSantis played tag team Thursday to attack Nikki Haley for her stance on the border and her attitude to Iowa, cementing her status as the candidate most likely to cause an upset in the nomination race.

The former president and the Florida governor have both stepped up their criticism of Haley as she surges upwards in the polls.

It intensified further with just 11 days to go before Iowa holds its caucuses to select the state’s preferred candidate.

The Trump campaign on Wednesday launched its first TV attack on Haley in the state of New Hampshire, which she is targeting for a win.