Priorities USA Action, a super PAC organized by two former aides to President Obama, released a video today arguing that under a Mitt Romney presidency, America would become a place where “Wall Street is unregulated,” the “middle class is decimated” and “American jobs are relocated.”

It’s also the latest sign that Democrats are convinced Romney will be the GOP nominee and are eager to set up the contrasts between the two candidates as quickly as possible. The longer this race is a referendum on Obama instead of a choice between two candidates, the tougher it is for Obama to win re-election.

An official with the group, which was organized by Bill Burton and Sean Sweeney, told ABC News that the goal of the ad is to “define the contours of the race” and “inform people about Mitt Romney’s America.”

The official also told ABC News that the video is part of a $100,000 campaign targeting social media outlets such as Facebook, Google, YouTube and online news sites.

Andrea Saul, spokeswoman for Romney for President, said, “More middle class American’s have lost their jobs under President Obama than any president in modern history. While Mitt Romney is focused on his jobs and economic plan, which will provide relief for the middle-income taxpayers, President Obama and his cronies are worried about their own jobs.

“It is no surprise since President Obama cannot run on his failed record that his political allies resort to false and negative attacks on Mitt Romney.”

While Priorities USA has been beating the anti-Romney drum pretty consistently for the past few months, the video is its sharpest attack yet.

It also stands in stark contrast to the soft-and-fuzzy ads touting the Texas governor’s record that the pro-Rick Perry super PAC, Make Us Great Again, is running in Iowa and South Carolina.

Indeed, with this video, Priorities USA is basically saying to Perry backers: “If you guys won’t take down the Romney campaign, we will.”

Many political insiders see the role of super PACs, which are prohibited legally from coordinating with a candidate, as the “bad cops” of the campaign world. Because they have no direct connection to the candidates, they can lob attacks against other GOP candidates without political blowback.