Democratic Rep. Tom Allen is faulting Republican Sen. Susan Collins for holding a single hearing on alleged corruption and mismanagement of civilian contractors in Iraq.

Allen, who is running for Collins' seat, is trying to turn her tenure as chairman of the Senate's chief investigative committee into a political liability as she campaigns for a third term.

Collins served as the Senate Homeland Security and Governmental Affairs chairman from 2003 until early 2007, when Democrats took control of the Senate. She held her first and only Iraq contractor hearing in August 2006 on a report issued by the special inspector general for Iraq reconstruction titled: "Iraq Reconstruction: Lessons Learned in Contracting."