Among Republicans who said that immigration is their most important issue – 19 percent of the electorate – Huckabee won 54 percent to McCain’s 31 percent. Twenty-three percent said Iraq is their biggest issue – McCain won among them, 53 to 40. Thirty-two percent said the economy is their most important issue, and McCain won them, too, 45 to 42. And 21 percent said terrorism is their big issue, with McCain winning 48 to 45.