He really had a plan.
Check it out:

An alleged sympathizer of the Islamic State terror group was arrested in Ohio on Wednesday after authorities learned that he was plotting a shooting and bombing attack on the U.S. Capitol.

Christopher Lee Cornell, 20, of Green Township, considered members of Congress as “enemies,” and planned to travel to Washington to kill employees and officers working in and around the U.S. Capitol, according to a criminal complaint. Authorities said he had two semi-automatic rifles and about 600 rounds of ammunition, and planned to build and detonate pipe bombs at and near the U.S. Capitol.