Senator David Vitter is in the news again.  He's facing another investigation involving his behavior.  This time, it's the Transportation Security Administration doing the investigating -- and Vitter's actions at Dulles Airport are the subject of that investigation.  It sounds like this is more that the "gossip" Vitter claims it to be:

The Transportation Security Administration is reviewing a report that Sen. David Vitter, R-La., set off a security alarm when he opened a gate door in his rush to catch a flight last week at Washington Dulles International Airport.

In a statement, Vitter said he accidentally went through a wrong door at the gate leading to the United Airlines plane he was trying to board.

A Roll Call newspaper report based on an anonymous tipster says Vitter had a heated exchange with an airline worker and then left the scene when the worker left to call security. Vitter said the report mischaracterized his conversation with the employee.

"I did have a conversation with an airline employee, but it was certainly not like this silly gossip column made it out to be," Vitter said. He said he was trying to get home.

TSA spokeswoman Lauren Gaches wouldn't comment Thursday on the nature of the alleged incident under review.

"It has to be looked into first," she said.

United spokeswoman Robin Urbanski did not specifically identify Vitter, but said that "somebody attempted to open a door that was closed," which set off an alarm. The airline contacted airport authorities, she said.