The only soul-searching that happens when either party loses big is the retreat to popular positions that each party traditionally wins on.
For Democrats, it's health care (though maybe not this time around), education, and "protecting the middle class".
For Republicans, it's national security (though probably not so much these next couple of elections), taxes and spending, and the size of government.
These things are popular with a huge majority of the country when phrased properly... and they always find a way to phrase it properly when they're boxed into a corner.
What we get when they're elected, though, is everything that's unpopular.
Hope and Change was silly in 2008 with Obama, but it's just as silly now and in 2012, 2014, and so on with the GOP and the Tea Party.