Well the "dominant forces" need to be taken out in two years at the next election, and in large enough numbers to make them back-benchers.
This is doable. Starting a 54th "third party" IS NOT!
Until then, they need to be pressured, embarrassed at townhall meetings, twittered against, criticized on conservative radio, ads run, naming them, harping against their positions...everything.
Well, good luck with that. Of course, this is all probably moot since I expect Congress to be dissolved or reduced to a rubber stamp for the dictator.