Senate Majority PAC is up with a new TV ad attacking former Sen. Scott P. Brown, R-Mass., over a report that he attempted to torpedo an energy bill sponsored by the New Hampshire Democrat he’s taking on in his Senate comeback bid.  

The ad slams Brown as a carpetbagger and refers to the Huffington Post report last week that Brown had lobbied against an energy efficiency bill backed by Sens. Jeanne Shaheen, D-N.H., and Rob Portman, R-Ohio.  

The Democrat-aligned super PAC put approximately $350,000 behind the ad, which will run for two weeks, according to a spokesman. “Scott Brown lobbied Republican leaders to kill the bill,” the ad’s narrator says, “hurting Shaheen and helping himself gain another Senate seat.”  

www.youtube.com/watch?v=SfLYyDWzYvo  

Brown also released a new ad Thursday. It plays up his New Hampshire roots — “I’ve been a homeowner in Rye for over 20 years” — while tying Shaheen to President Barack Obama and the health care law she voted for.  

https://www.youtube.com/watch?v=vQWWS9H8ukc  

The race is rated Democrat Favored by the Rothenberg Political Report/Roll Call.