-- a charge Johanns' office denies.

Change That Works Nebraska spokeswoman Meg Mandy says the group stood outside the doors of a University of Nebraska Medical Center building where the meeting was being held. She says the group held a banner calling for health care reform, but was quiet. She denied that the group was protesting the senator or his stance on health care reform.

However, she says, a couple of the senator's staffers watched the group as it was setting up and "gave us a dirty look, and about five minutes later, the security guards showed up."

The group was asked to move about 20 feet back to a sidewalk.