The bait and switch playbook
If you're the "Conservative" base, the Republicans will promise to prevent or halt social progress of one kind or another. (The crazier ones will promise to turn back social progress) They'll blame problems with the economy on reckless liberal policies. They'll say that getting government out of the way of business will allow the jobs to come pouring in.
They need everyone to forget, or not understand, that we've had exclusively conservative policy for the last 40 years or so, and that's how we came to be where we are.
If you're the "Liberal" base, Democrats will promise to promote social progress, and work against the Republicans' efforts to turn back the clock. They may also pay lip service to progressive policies.
They need everyone to forget, or not understand, that we've had exclusively conservative policy for the last 40 years or so, and that's how we came to be where we are, and that those 40 years of conservative policies wouldn't have been possible without the cooperation of Democrats.
Of course the switch is the Reagan revolution, the sale of the Government to the mighty Capital, the Government acting on behalf of Capital and against the people. The payoff is all of us being played for chumps.
We all need some new options.