There's an interesting dichotomy right now in how Democrats and Republicans feel about their own parties. Democrats are much more likely than Republicans to think their party is headed in the right direction. But at the same time unhappy Democrats are much more likely to abandon their party at the polls this year than unhappy Republicans. So even though there are a good deal fewer of them, angry Democrats are a much bigger threat to their party's prospects in 2010 than angry Republicans are to theirs.
On our most recent national poll just 54% of Republican voters said they were pleased with the direction of their party. The 46% who fall into the unhappy or not sure camps though still say they'll vote for the GOP by an 82-9 margin this fall.
By contrast 83% of Democrats are happy with their party's direction. But among those who aren't 48% are planning to vote for Republicans this fall to 36% who are planning to vote Democratic. So despite the fact that there are far more GOP voters mad at their party than Democrats, the number of angry Democrats planning to vote Republican is actually larger than the number of angry Republicans planning to vote Democratic. It's just one more thing the party is going to have to cope with for this fall.