They'll do much better with turnout than they did in 2010, when they got blindsided. They've built up a formidable GOTV machine.
The GOP will take independents handily (Romney did as well), but the key to winning big is getting out the GOP vote. If 4 million GOP voters sit home as they did in 2012, be prepared to be disappointed.
If GOPe idiots keep pushing 'immigration reform', er, amnesty, look for the GOP voters to sit home.
And get ready to hand the gavel back to Pelosi.