The Republican establishment has no interest in Trump’s success on this.
If the Party of Stupid had any leadership abilities, they could control DC and keep the Dems in minority status for the next 40 years. But, they are known as the Party of Stupid because they are stupid. They prefer the old establishment status quo and would be quite satisfied with the Dems regaining control of Congress.
If the Dem Party wasn't in such disarray, they could easily come back to majority status in the Congress in 2018 and 2020.
If the Party of Stupid had any leadership abilities, they could control DC and keep the Dems in minority status for the next 40 years.
The GOPe are not stupid. They’re progressive corportists.