Historically, the GOP had been the tougher of the two parties on Russia; it was Romney, not Obama, who identified Russia as a serious threat during the 2012 debates. Trump changed all of that, with his inexplicable enthusiasm for Putin, and his party followed. The Republicans blew off the threat to Ukraine during the impeachment proceedings for purely partisan reasons. But what about now, since Trump is no longer president? What will the GOP leadership do if Putin turns the screws on Ukraine during Biden’s term?
My guess is that the party will split, but most of the sentiment will be in favor of a harder line on the Russian government. There will be some post-Trump empathy for Russia, but not much. Trump will not be able to carry his party on this point. The Cold War will prevail over the culture war.