Paul Ryan's presidential prospects may have dimmed this week, but his future on Capitol Hill has never looked brighter. The budget compromise he struck with Sen. Patty Murray, which passed the House on a lopsided 332-94 vote Thursday, had conservative activists and outside groups howling. That might one day curb Republican enthusiasm for Paul Ryan the presidential candidate. But inside the dome, overwhelming support for Paul Ryan the policymaker—even from those voting against his proposal—armed him with a major legislative victory and a reputation as a bipartisan consensus-builder. That means bigger things may be on the horizon. "Paul did astonishingly...