Sen. Ben CardinBenjamin (Ben) Louis CardinHouse passes bill to begin scenic byways renaissance GOP lawmaker: 'Dangerous' abuse of Interpol by Russia, China, Venezuela Senators pressure Trump to help end humanitarian crisis in Kashmir MORE's (D) town hall is veering towards hostility, with audience questions becoming increasingly confrontational.

One man charged Cardin with "usurping authority" in pursuing health reform, while several others peppered Cardin with jeers and boos.

A moderator has asked for calm twice, and Cardin has vowed to keep his answers brief but opponents have little patience, often shouting down questioners before they can address the senator.

-J. Taylor Rushing