You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.

Category: THE VICE PRESIDENCY 
Clue: Cardiological term often used for the distance the vice president is "away" from the most powerful office in the land
heartbeat

Category: THE WHITE HOUSE 
Clue: When electric lights were installed in 1891, this pres., afraid of being shocked, wouldn't operate the switches
benjamin harrison

Category: THEY EAT THAT? 
Clue: A food stand by London's Petticoat Lane is called, & serves, "Jellied" this elongated fish

eel