Click here to watch "Closed."

While the Democratic ad war in Pennsylvania becomes increasingly embittered, the airwaves in Indiana and North Carolina -- the two primary contests after the Keystone State -- have remained notably free of internecine mudslinging.

Hillary Rodham Clinton's newest television spot, her second in Indiana after last week's endorsement ad from Sen. Evan Bayh, continues that trend by focusing criticism on President Bush and the effect of his policies on America's security and the state's economy.

Highlighting a shuttered munitions factory in Valparaiso, "Closed" deftly ties together anxieties over national security and the economy. "Right here, over 200 Hoosiers built parts that guided our military's smart bombs to their targets," Clinton says. "They were good jobs, but now they're gone to China. And now America's defense relies on Chinese spare parts." Clinton proceeds to blast Bush for allowing the outsourcing of defense jobs and promises that she will turn the economy around.

By showing former employees of the plant and shots of Clinton pressing the flesh on a factory floor, the spot seems to be aimed at confirming Clinton's recent claims that she is the candidate most in tune with the working class. And by focusing its attacks on Bush rather than Barack Obama, the ad's double whammy on defense and the economy will likely resonate with a wider swath of Democratic voters.