It's not merely that conservatives are better at selling their product, or that they happen to have an easier-and undoubtedly simpler-ideological product to sell. It's that they know what they are selling. Liberals in general and Obama in particular cannot say the same.
“I know I live a charmed, beautiful life and nobody wants to hear a celebrity whine. The last thing I want to do is complain; I love what I do and I know every job comes with a downside.”