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.
“So this is why I'm always say happy that somebody mentions Rwanda, because behind Rwanda, we have Africa.”
“We need to continue to decrease the growth rate of the global population; the planet can't support many more people.”