Updated 9:31 a.m. | A Democrat-aligned super PAC has booked airtime in Louisiana, where Sen. Mary L. Landrieu, D-La., is facing one of the toughest re-election races in the country.

Senate Majority PAC’s first ad in the Bayou State criticizes GOP Rep. Bill Cassidy for voting to raise the retirement age, “to raise Medicare costs $6,000 per year” and to shut down the federal government.

Watch the ad here:

https://www.youtube.com/watch?v=UOucxyQWsnA

According to a Republican tracking ad buys, Senate Majority PAC has booked $218,000 in broadcast TV time for a 30-second ad between Friday and Dec. 21. A Democratic source confirmed the ad would be going up Friday and pegged the total buy at around $250,000.

The new ad comes days after the Landrieu campaign released its first TV ad of the campaign. The third-term senator is being challenged by Cassidy and retired Air Force officer Rob Maness, a Republican backed by some outside groups.

The race is rated a Tossup by Rothenberg Political Report/Roll Call.