AUGUSTA, Maine— Republicans believed the Blaine House was theirs all along. GOP control of the Senate was a distinct possibility. But taking the House, too? That was a surprise. “I think the stars were all aligned yesterday in Maine, for really the trifecta: the Republican governor, the Republican House, the Republican Senate,” said Rep. Robert Nutting, R-Oakland. Wednesday morning, hundreds of enthusiastic Republicans packed into the State House’s Hall of Flags to celebrate that trifecta. “We had a pretty good night,” said Rep. Josh Tardy, R-Newport, the outgoing House minority leader. “I’m proud to say Republicans have been ready for...