ANNAPOLIS, Md. - Democratic Senate candidate Alan Lichtman said Friday his arrest for trespassing at a televised senatorial debate the night before was unnecessary because he was involved in a peaceful protest. He was protesting the decision by sponsors of the debate to allow only Ben Cardin and Kweisi Mfume to participate. Lichtman and his wife, Karyn Strickler, were arrested along with a campaign worker when they tried to enter the Maryland Public Television building and refused repeated requests to leave a small vestibule at the entrance to the building. "I did not have to be arrested because I was...