The further left the Democratic Party goes, the further left the Republican Party will drift into that murky middle. Then at the voting booth you have a choice between socialists and a big spending Republican Party. I wish the Democrats would move right so the Republicans would start acting like Republicans again.
The problem with the leftward shift in the Rat Party is that as a result, the GOP has gotten watered down by moderates who really should be Democrats, but the party is too looney for them.