Marc Scaringi will be the second Senate candidate on the air starting this week. The Cumberland County attorney and former staffer to Rick Santorum will launch a $600-1,000 radio ad buy in central Pa.

It’s a 60 second spot that’s all positive bio information on Scaringi himself.

“I started my own business, and for the past decade I’ve been minding my own business. But then came Barack Obama and Robert Casey, and their policies are bankrupting America,” Scaringi says in the ad.

You can listen to the entire spot here.

The campaign is airing the ad 20 times on stations WBLF-AM (news talk) and WQCK-FM (country) weekdays from March 1-14, which broadcast out of Centre County and reach Blair, Centre, Clearfield, Clinton, and Huntingdon counties. The campaign didn’t name the cost of this ad buy, but based on this writer’s knowledge of radio ad rates in the region it’s probably between $600 and $1,000.

Former coal company owner Tom Smith was the first candidate to go on the air – with a somewhat more serious buy. He’s put around $1 million on television thus far.

Scaringi is the little engine that could in the U.S. Senate race. He’s been trucking from local meeting to local meeting since December 2010, talking with activists and Tea Party folks. It paid off when he turned in around 5,500 petition signatures – putting him nearly in second place among all candidates. And he brought in the endorsement of the libertarian-leaning Republican Liberty Caucus.

But so far, the shoe leather effort has failed to translate into campaign success. From the start, Scaringi has struggled to raise campaign cash (he raised just $10,000 in the fourth quarter). He brought up the rear in the most recent poll of the race, with just 1 percent of the primary vote.