Can't believe no one has done this yet ... but ever since I first heard the term this is what flashed into my mind's eye.
The background is red, to represent the Republicans being shoved into by the Democrats. The tea cup is white, to represent America ( a blending of all the colors of the light spectrum). The shadow on the tea cup is blue to represent Democratic influence trying to seep into the tea cup. The letter 'A' in tea is blue to represent the 'A' in 'T&A', as the Democrats mascot is an Ass, Jack or otherwise. The wave of tea (the contents of America) has risen up and is about to smack down onto the sugar cubes of the White House and Capital.