he knows that if he lets the Extreme rw of his party tank the world econ, it won't bode well for him or, more importantly, this great nation.
Their paymasters (the Kochs) did come out & tell them to knock off the ACA bashing as it was bad PR for them once it was discovered they were bankrolling it.
If you have a link to where the Koch's said that I would appreciated seeing it.