“Sen. John McCain, recently diagnosed with brain cancer, entered the chamber to a standing ovation and cast the 50th 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.” From Politico: Republicans vote to proceed with debate on Obamacare repeal.

+ Now the Senate has to decide which of a few bills and strategies they’ll pursue. President Trump says they’ll come up with something really, really wonderful. Phew.

+ Vox has a useful flowchart that helps explain what comes next in the Republican effort to repeal Obamacare. (At this point, I hope I’ll be covered for confusion.)