It's been going on for many years, at least since Teddy Roosevelt: While the Left claims to want bipartisanship and compromise, the incremental clicks of the ratchet only go in one direction: toward European-style social democracy.
That's what William F. Buckley Jr. meant by "A Conservative is a fellow who is standing athwart history yelling 'Stop!'"
The fatal flaw of democratic systems, of course, is that people figure out they can vote themselves things. The US wasn't planned that way, but it's become that way. Progressives call it Progress.