If you think it's a conservative country now, just wait another 20 years. Liberals concentrated in metro areas aren't going to flip the senate. Heavily gerrymandered districts give them a ~6% handicap for the Congress and Electoral College, not to mention a conservative Supreme Court that supresses voting.
I expect a second Trump term then a change, but if anyone is expecting America to come to her senses and join the rest of the progressive world.. that a never going to happen. The country is split, with half the population clinging to history and religion (Christianity + Founding Fathers) - and the electoral system tilts in their favor.