WASHINGTON - White tablecloths, polished silverware and candlelight are the tools of a cunning suitor. But when found in a dining room in the House of Representatives, they signal high politics rather than romantic intentions. The elegant atmosphere is what Rep. John Shadegg of Arizona, chairman of the House Republican Policy Committee, is using to help build agreement among his GOP colleagues on an issue where there is little: immigration reform. "I want people to realize that there is more that holds us together than pulls us apart," he said. Now, the elements of a major policy push are coming...