Former Massachusetts Sen. Scott Brown is moving to New Hampshire, his latest step toward a possible Senate run in the Granite State.

According to Bloomberg, Brown is slated to finalize the sale of his home in Wrentham, Mass., this week, and will subsequently move to New Hampshire.

A representative for his law firm, Nixon Peabody LLP, said he'll continue to work out of the firm's Boston office because he isn't licensed to practice law elsewhere.

The move signals a potential challenge to Sen. Jeanne ShaheenCynthia (Jeanne) Jeanne ShaheenAmerica will not forget about Pastor Andrew Brunson Shaheen sidelined after skin surgery Members of Congress demand new federal gender pay audit MORE (D-N.H.), who Republicans believe to be vulnerable heading into 2014.

And though the GOP still has yet to front a top-tier challenger, Shaheen is already the target of heavy Republican attacks.

On Monday, a super-PAC launched a new ad charging that, "on health care, Jeanne Shaheen didn't tell the truth."

The ad, from Ending Spending Inc., includes a clip of Shaheen defending the healthcare law on the Senate floor and notes the number of New Hampshire residents who have had their plans canceled under ObamaCare.

“If you like your senator then you can keep her. If you don’t, you know what to do," the ad closes.

According to WMUR, the ad is backed by a $43,000 buy and will run Tuesday through Sunday of this week.

Brown, too, has focused in on the Affordable Care Act and its rocky implementation in broad attacks on Democrats, most recently in an op-ed that raised eyebrows for its focus on New Hampshire.

In it, he singled out the state as one negatively affected by ObamaCare. He closed that op-ed with a warning that tracks closely with the one that concludes the Ending Spending ad, that Democratic senators could face electoral consequences for the law.

"Not only is President Obama to blame here, so too are every single one of the Democratic senators who forced this fiasco on the American people," he wrote.

"The president is not going to face voters again, but his congressional enablers and supporters will in less than a year. When they do, it’s going to be an unpleasant experience for any incumbent having to explain their deciding vote and continued support for the ongoing disaster of ObamaCare."