The Democratic Senate primary debate saw some explosive rhetoric and a genuine confrontation — just not from the candidates. The two candidates, Ben Cardin and Kweisi Mfume, agreed on the vast majority of issues, with Mfume presenting himself as somewhat more forceful and slightly to Cardin's left, as expected. The real surprise came from American University Professor Allan Lichtman, a candidate who was not invited to participate due to his ratings in the polls being too low; in fact, many polls have not even included him.

According to the Washington Post:

Thirty minutes before it began, police arrested one Democratic candidate -- American University professor Allan J. Lichtman -- who was locked out of the Maryland Public Television studio in Owings Mills. After a 15-minute standoff, Baltimore County police dragged Lichtman and his wife in handcuffs away from the studio's front door. He was charged with criminal trespass.

"This is Democracy?" Lichtman shouted repeatedly. "Let the voters decide."