“Sorry. Oops,” Texas Governor Rick Perry said last night when pressed during a Republican presidential debate to name the third federal agency he would eliminate if he won the White House.

“It is three agencies of government when I get there that are gone. Commerce, Education and the — what’s the third one there? Let’s see,” said Perry, who has repeated the trio of agencies on the campaign trail innumerable times.

This wasn’t the first such misstep for Perry — and it joins a long history of gaffes during televised debates that have become a central and unforgiving element of modern American presidential campaigns.