What is the emblem of the Democratic Party?

The main political symbol for the US Democratic Party is the donkey, ideally incorporating at least a couple of stars and the colors red, white and blue.

A couple of years ago, the Democratic Party tried out a new logo, of a white letter D on a blue background, meant to evoke D for Drive versus R for Reverse, but its public reception was underwhelming. Most people know it only from Jon Stewart's ridicule. Thus, for the time being, they're sticking with the donkeys.