Exactly. Impeachment backfired on the Republicans to a small extent (except that in a weird twist of fate, there's little doubt that we'd have President Gore today if we'd have won that battle), and there's just no chance that the Democrats would actually open the impeachment can again this time.
They can get more mileage out of threatening to do it, than to actually commit to it. It's total BS. Even Terry McStupid won't back that plan.