Newt Gingrich spent more than 30 years building relationships in Washington, but relatively few of his old colleagues in town have ponied up for him. His campaign reported pulling in just $278,000 from the Washington metro area last year — a drop in the bucket compared with the $2.5 million raised in Washington by his chief rival, Mitt Romney, who has spent little time there. Those numbers, compiled by the Center for Responsive Politics, are for checks of more than $200. Gingrich’s weak showing in Washington is not surprising to many of the former Hill staff, lobbyists and members of...