The leading pro-Nikki Haley super PAC is making last-ditch efforts to help the former U.N. ambassador gain an edge over Gov. Ron DeSantis (R-FL) in Iowa, the latest being an ad portraying the Florida governor as a “suck up“ to former President Donald Trump.

The Stand For America PAC released the ad as part of a $1.6 million buy, one of several that Haley has funneled into the Hawkeye State ahead of the Republican caucuses, which begin on Monday. In the final stretch before the caucuses, Haley and DeSantis continue to battle for second place as Trump holds on to his steady lead among GOP voters.