We had that in the US when there was a moderate wing to the GOP. Names that many are familiar with for their liberal if not progressive policies were all Republicans. John Lindsay, George(Mitt's dad) Romney, Bill Scranton, Jake Javits, Nelson Rockefeller, Charles Percy, Mark Hatfield, .... amongst others.
Those names are mostly gone but the few moderate names in the party show up only when there's discussion of the few possible Senate votes that might go against the administration. They are not a force and have no leader. From 1950 to even the Nixon/Carter elections there wasn't that much difference between the two parties. They gussied up their campaign promises but they were basically both following the same agenda with minor bumps in the road (the Vietnam War was originally a Democratic war and the GOP didn't say a thing about it; when the public sentiment changed and a large segment of the Dems got behind the anti-war movement, the GOP stepped up to be the Warrior Party.
All of that changed with the advent of the right wing coalition of fundies, money grubbers (tax cuts) and right to lifers. It didn't happen overnight, but by dribs and drabs from the late Nixon years through to present day.
In short, I used to joke about voting with Mark Twain's possibly apocryphal quote: "Oh, I don't vote. It only encourages them." The Dems may have very little substance worth voting for but the Dems as foils to the totally reprehensible current GOP? They get my vote.