From the GW Hatchet, the George Washington University newspaper:
Though the rally was a mostly peaceful gathering, two rally attendees got into a heated argument with an employee at the GW Deli over the D.C. bag tax, which ultimately resulted in the tea party member throwing a sandwich in the deli employee’s face. The GW Deli declined to comment on the issue.
The D.C. bag tax is a fee levied on disposable bags from stores and restaurants. It costs five cents per bag.