But you are only looking at this latest election, more a resounding display of defiance towards the administration. This is a very temporary result and not a good way to take the long term pulse of the nation's political direction.
Over the last twenty years or so, many more moderate Republicans have been elected with the help of Democrats. The Governors of New York, Massachussetts, Pennyslvania, California, and Michigan have all experienced well-liked Republican Governors and certainly these states are the heartbeat of the Democratic Party. Consider about a dozen Senators who hail from solidly Liberal states but enjoy victory after victory because of their disassociation from the evangelical movement. The Democrats don't have such a track record with crossover voting, and haven't for a long time. The phenomenon in the Rocky Mountain West is more a temporary revolt from the Bush administration more than a long term signifcant political change (apart from Colorado maybe).
In looking at successful Republican candidates in solidly Democratic states, the one unifying creed is the distance from the religious wing of the Republican Party. In looking at successful Democratic candidates in solidly Republican states (apart from this last mid-term election), they tend to be very moderate and pro-business. The exact type of Democrat that many libertarian business-oriented Republicans are happy to vote for. And the type of Democrats that may indeed migrate to a new party if the Pelosipolitik continues.
It would be hard to say the Ensign or Pataki or Romney's of American politics aren't quite different than mainstream Democrats.
Only a couple years ago there was great rumblings within the establishment of a rebellion in the Democratic party to move it towards the center. This didn't happen in the recent elections per se because this recent election was much more against the Republicans than for the Democrats.
We will have to wait and see...
~Chris