I don't think it's a matter of "Let them" anymore. It's quite obvious that they WILL get everything they want. The question is only, do they get it all this next four years or do we drag out the day of reckoning a little bit further.
As Mark Steyn said, the Republicans are seldom in office, but never in power. They merely preside over the infrastructure the Democrats have been steadily building for 60 plus years.
They can't even get PBS unfunded.