Washington (CNN) - An MSNBC host has taken a full page ad out Friday in The Boston Globe slamming Sen. Scott Brown, R-Massachusetts.
Rachel Maddow accuses the senator of making things up, and smearing her to raise money and, essentially, insulting Massachusetts.
In the ad, Maddow, who lives in Massachusetts, criticizes Brown for a fundraising e-mail that he sent out this week where he suggests she might challenge him in 2012.
"[B]efore I've even settled into my new job, the political machine in Massachusetts is looking for someone to run against me," Brown wrote supporters. "And you're not going to believe who they are supposedly trying to recruit – liberal MSNBC anchor Rachel Maddow."
Brown's e-mail then takes a shot at the cable news host. "I just don't think America can afford her liberal policies," he said.
Brown cited an obscure Boston-area blog post from March 5 as the source of the Maddow rumors.
Firing back, Maddow wrote in her ad, which she also posted on her blog that Brown, "made that up."
"I'm not running against Scott Brown," Maddow wrote. "I never said I was running against Scott Brown. The Massachusetts Democratic Party never asked me to run against Scott Brown."
"It's just not true. Honestly. I swear." The cable news host added that Brown "never even tried to find out if it was true."
Instead, Maddow claimed Brown is smearing one of his constituents to "scare donors into giving him more money." Maddow said, to her, that feels like Brown is insulting Massachusetts.
Brown won his seat in a January special election to fill the remaining three years of the late Democratic Sen. Edward Kennedy. But he must face voters again, in 2012, to win a full term.