There are signs of life on the GOP side when it comes to going after vulnerable Senate incumbent Mary Landrieu. Last Friday, she was sued by Republican state senator Paul Hollis,

…contending that she cannot represent Louisiana because she lives full-time in Washington.

The suit was filed Friday in state district court in Baton Rouge. It says Landrieu's home "is her 2.5 million dollar residence on Capitol Hill."

Landrieu is registered to vote in Louisiana, using the New Orleans address where her parents live. It's owned by a trust in which the senator, her eight siblings and their parents share equally.

This is great theatre, though the wheels of justice grind so slowly that there is unlikely to be any court testimony in time for the November election. But having placed the question on the table, American Crossroads has followed up with an ad, for the moment limited to the internet but suitable for airing on television closer to the election, that Washington Post writer Aaron Blake terms it “rough.” He notes:

Where Landrieu differs from others who have faced similar questions, though, is that she has routinely worked on issues important to the District of Columbia. Hence, there are a whole bunch of news clips talking about her focus on D.C. -- which isn't exactly helpful for her very difficult reelection race.

American Crossroads is up with a damning new web ad splicing together many of these clips. It ends with a particularly devastating quote from embattled/outgoing D.C. Mayor Vincent Gray (D), who appears to describe Landrieu as "the senator representing the District of Columbia until we become the 51st state of the United States..."

Watch it and see for yourself: