GRAND CAYMAN, Cayman Islands — Mike Huckabee said he was having such a good time here in this sun-splashed tourist resort that it may take a S.W.A.T. team to get him out of his hotel room at the Ritz Carlton and head back to the snowy campaign trail in Wisconsin. He had faced questions late last week about why he was leaving the trail – Wisconsin votes Tuesday — to come and give a paid speech. Speaking to reporters here before he delivered the speech, he said that Senator John McCain, his chief rival, was taking two days off while...