Well, obviously. Only a leftist loon could deny it. It is a pleasure to see the spectacularly obvious point made in a NYT op-ed piece by Peter Wehner:
AMONG liberals, it’s almost universally assumed that of the two major parties, it’s the Republicans who have become more extreme over the years. That’s a self-flattering but false narrative.
This is not to say the Republican Party hasn’t become a more conservative party. It has. But in the last two decades the Democratic Party has moved substantially further to the left than the Republican Party has shifted to the right. On most major issues the Republican Party hasn’t moved very much from where it was during the Gingrich era in the mid-1990s.