Sen. Bob Menendez (D-N.J.) on Tuesday insisted he’s innocent as more than a dozen of his Senate Democratic colleagues called on him to resign over last week’s indictment on bribery charges.

Asked by a reporter on Tuesday at the Senate over why he isn’t resigning, Menendez had a quick and simple retort.

“Because I’m innocent,” Menendez said in response to a question from NBC News correspondent Ryan Nobles.

“What’s wrong with you guys,” Menendez added.

In keeping with Senate Democrats’ protocol, Menendez stepped down from his powerful position as chairman of the Senate Foreign Relations Committee.