The myth that Democrats refused GOP input on Obamacare has been thoroughly debunked. Even that bastion of liberalism Fox News proclaimed in a 2009 headline 'Obama Reaches Out to Republicans on Health Care'. Inspired perhaps by Trump's claim that Obama was an African born imposter, the GOP had openly pledged to block him at every turn. 

When Republicans voted with the help of Pence to re-open debate on health care yesterday, most had no idea what McConnell's bill contained. And yet a few hours later Senators were being asked to approve it. Doesn't get more partisan and secretive than that.

Yes Collins and Murowski showed grit but I'm confused by your qualifier that it wasn't their conscience they were following. With a paltry 17% of the public supporting the GOP plan to gut Obamacare, do you think they were somehow acting against the best interest of their constituents?