"It stinks, but I'm Benedict Arnold. I have practically the biggest part"

 Benedict Arnold was a Revolutionary War general who originally fought on the American side but switched allegiance to the British. As commander of the fort at West Point, he tried but failed to hand it over to the British army.

In the U.S. his name is synonymous with the word "traitor," but Phoebe doesn't care about that - only that she has the biggest part!