WASHINGTON -- President Barack Obama's re-election campaign is keeping up its effort to paint Mitt Romney as a job-destroying corporate raider at Bain Capital.

In a video released Monday, Obama's campaign zeroes in on a Marion, Ind., company, American Pad & Paper, also known as Ampad. The ad charges that Ampad bought and closed the SCM office products plant, immediately costing 250 workers their jobs.

The aim is to challenge Romney's arguments that he's more qualified than Obama to handle the country's shaky economy.

The ad says Romney and his partners multiplied their investment in the office products plant by 20 times while the company went on to lose some 1,500 jobs and went bankrupt by 2000.

Former Ampad worker Randy Johnson calls Romney's performance "just the opposite of Robin Hood."

Johnson also attacked Romney during his 1994 U.S. Senate campaign over job losses at Ampad, which helped sink his candidacy against Sen. Edward Kennedy (D-Mass.).

The ad comes the day after Newark, N.J. Mayor Cory Booker (D) walked back his comments on "Meet The Press" calling the Obama campaign's attacks over Romney's Bain record "nauseating." In a YouTube video released later Sunday, Booker called it "reasonable" for the "Obama campaign to examine that record and to discuss it."

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