Well, this USA TODAY/Gallup Poll did ask the same question of the Democrats
There appears to be a lot more unity on the blue side...
"Like the Democrats or not, there was a broad consensus about who speaks for the party. Obama was named by 58%. He was followed by 11% who cited House Speaker Nancy Pelosi and 3% who cited Secretary of State Hillary Rodham Clinton. Twenty-one percent couldn't come up with a name."
