NOTHING! Because they`re spineless, progressive traitors. Then, climb into bed, pull the covers over your head and curl up in the fetal position with a shotgun and wait for the next civil war.
With the loser's attitude you have, there is no hope.
The way a GOP majority in both houses of Congress can control the agenda is simple: cut the purse strings on programs that limit economic freedom or otherwise infringe on Constitutional rights. The President can issue executive orders until his pen runs dry and his phone battery dies. The executive agencies can crank out regulations until their hard drives crash. But if Federal agencies lack the finances to enforce administrative regulations, executive orders, and laws passed by the Democrat Congress from 2007 to 2010, these regulations, orders, and laws are dead letters.
That being said, I will be surprised if the Republicans will do it, not as long as Boehner, McConnell, and their cronies are in charge.