Restore Our Future, a super PAC supporting Republican presidential candidate Mitt Romney, is launching a $2.1 million ad campaign in Democratic-leaning Pennsylvania. 

Of that buy, $1 million is being devoted to the expensive Philadelphia market. Americans for Job Security, another anti-Obama group, bought $1 million over the weekend. 

Does this buy mean Republicans think Pennsylvania is in play? Not necessarily.

Restore Our Future has already spent nearly $4 million on ads in Pennsylvania, mostly over the summer. But there hasn't been a poll showing Romney ahead in the state since February. According to Real Clear Politics, the president's polling average lead in Pennsylvania is 4.7 points. 

As of mid-October, Restore Our Future had $24 million in cash on hand. With only a week left before the election and swing state markets saturated, the group likely can afford to spend money around.

"They understand that they're not going to win Ohio, and now they're getting desperate," Obama campaign manager Jim Messina told reporters on a conference call Monday. But, he added, the Obama campaign will compete on the airwaves in Pennsylvania: "We're not taking any state for granted."