Retaking congress alone will accomplish none of that since der Fuehrer will refuse to sign any bills turning around his power grab.
Retaking congress would enable the cutting off of funds for the parts of the government entities running his Nazi programs.
Cutting off funding is one of the steps of course, but nullifying his signature with investigations of his citizenship, the hundreds of SS numbers this jackal has used, etc. will likely force an early termination to his presidency, along with all of his accomplices on the basis of who knew what and when.
So who needs his signature if he's no longer there? Asssume the House flips, Boehner becomes speaker, Obozo and Plugs are forced to resign. We will be looking then at a care-taker President Boehner -- the Cromwellian model.
Consider this model a little further: England has it's "Glorious Revolution" in 1688 with what was essentially the peaceful removal of King Charles II by Parliament, and at that a mere ~40 years since Charles I was beheaded -- by Cromwell.
The US could depose its "Messiah" and jail the rascals who covered for him. Democrat will become synonymous with Traitor, even as the term "Catholic" eventually became in England. Not a Catholic King has sat on the British throne since.
Blend the Cromwellian model and the purges that followed together with the Glorious Revolution extension of that model in 2011 and yes, it could happen here.