One example in NJ was "Millionaires tax", Corzine (Democrat) passed it for a year, let it sunset during his lame duck period (had ample opportunity to sign it), Christie (Republican) came into office with the promise of not raising taxes, so he didn't sign it and there was a big blow out during the Senate elections. And then there was the "Gay Marriage" thing in NJ, Ample opportunity to pass it when democrats controlled both the house and senate, and governorship, but vote it down, then when a Republican becomes governor, they "find" the votes to pass it so that he can veto it.
It least in NJ here's how the two groups pander
Democrats- Big cities, poor, specific minorities, public worker unions
Republicans - property owners, suburbs, wealthy, senior citizens
Both groups say pander to the "middle class" but really do not do anything for them