I think you're putting far to much faith in people willing to vote (R), their base would vote for them even as their families are sent to labor and death camps, while undecided and 'independent' voters will cast their ballot entirely on the last headline or 72 hours.
To me this reeks of Greene and other Magots realizing their wing of the party is imploding and will have to find a place in what ever GOP comes out the otherside of this election and the next midterm. Trump's decline makes it pretty obvious they need someone else's coattails to grab onto and rally around, so she's trying to be the loudest voice in the room to be part of the new power structure if not the face of it.
It matters very little if I or any of us have faith in the republican voter base and rather it matters if the Republican leadership thinks it could matter to a significant enough portion of their base that they should avoid a shutdown.
Also, I find the rest of your comment to be quite insightful. I do think most of the Republican leadership are still all in on Trump, however I wouldn't be surprised if there some back up plans in the works.
KEEP
GOVTOUT of MY MEDICAREAnother accidentally prudent statement.