As with the slavers in the 1850's , they know that they're a minority but they don't care. They've worked out how to establish minority control, and they fully intend on locking it down permanently.
Once Gorsuch is on the USSC, the possibility of effective legal/democratic resistance to the TrumpGOP is gone.
After that, you're faced with the choice of turning to illegal tactics, or waiting to somehow be rescued by a civil war within the GOP (on the incredibly-unlikely hope that the winner would inexplicably surrender minority rule and restore representative democracy).
 Yup, I'm re-reading Battle Cry of Freedom again, and I'm still finding that the antebellum political machinations of the slave power caucus are strikingly familiar.