As earlier noted, an open rift is appearing in the Senate GOP between the filibustering Rand Paul (and Co.) and the dining John McCain (and Co.). Whereas Paul took the battle to the Senate floor and from there via C-SPAN to the American people, the others went to dinner with the president.
How these two arms of what is ostensibly the same political animal interact with each other is going to be the key to what happens for the rest of the legislative year. The fiercest battle will be within the GOP and not necessarily between the GOP and the president or the GOP and Senate Democrats.
As fun as open floor politics is for the plebs outside, it is still what happens behind doors that matters. It will be the job of those behind the doors to get their act together in time to keep the noise outside from getting loud enough to have to be invited in.