WASHINGTON — New Hampshire Tea Party movement activist Andrew Hemingway is not lacking in contact with likely presidential candidates. He’s talked hockey with Tim Pawlenty. He sat down with former Pennsylvania senator Rick Santorum at the Concord Country Club. And plans are in the works for Mississippi Governor Haley Barbour to appear before a group of Hemingway’s fellow conservatives. the notable exception among the field of would-be GOP presidential contenders? Mitt Romney. “Romney for the most part is inaccessible,’’ said Hemingway, a Bristol resident who is chairman of the state’s Republican Liberty Caucus. “Pawlenty, I could call him right now...