GOP centrists buck leadership on ObamaCare subsidies; White House does damage control

12:30 Report is The Hill's midday newsletter. Subscribe here. Happy Wednesday. Christmas Eve is one week from today!! 🎄To keep you updated on my holiday baking journey, today I’m making Alvin Zhou’s 100-hour brownies. In today's issue: • 4 Republicans defy GOP, force ObamaCare vote (!) • White House does damage control • Trump doubles...