Senate Republicans voted Tuesday voted to open debate on repealing Obamacare, dramatically reviving an effort that many GOP lawmakers left for dead just a few days ago. The vote is a huge political win and turnaround for Senate Majority Leader Mitch McConnell and Republicans who've promised for seven years to repeal Obamacare if voters gave them control of Congress and the White House. Sen. John McCain (R-Ariz.), recently diagnosed with brain cancer, entered the chamber to a standing ovation and cast the 50^th Republican vote. GOP Sens. Susan Collins of Maine and Lisa Murkowski of Alaska broke ranks to oppose the measure, forcing Vice President Mike Pence to break a 50-50 tie/Politico. More here.