Fred Thompson’s progress toward becoming a Republican presidential candidate will take a step with the return of Congress from its Easter break when he meets privately with a large group of Republican House members. GOP House leaders had prepared last year to board George Allen’s campaign wagon before his defeat in Virginia for re-election to the Senate eliminated him from presidential consideration. They had been moving toward support of former Massachusetts Gov. Mitt Romney, led by former Speaker Dennis Hastert’s endorsement. But many have stepped back from Romney and are looking hard at Thompson. One member of the GOP leadership...