The final Emerson College Polling Iowa survey finds 55% of Republican caucus voters plan to support Donald Trump on Monday evening, while 21% support Nikki Haley, and 15% Ron DeSantis. Five percent support Vivek Ramaswamy and 2% Asa Hutchinson. Four percent are undecided. Since the last Emerson Iowa poll in December, Trump’s support has increased five points, from 50% to 55%, while Haley’s support increased four points, from 17% to 21%. DeSantis held his 15% support, and Ramaswamy’s support fell three points, from 8% to 5%.