Craig Newmark, the founder of Craiglist, is a big donor to Democrats and their party. In all, he’s donated nearly $90,000 to various candidates and party groups, including more than $30,000 to the DNC and nearly $10,000 to President Obama.

And he’s also given $500 to Congressman Pat Murphy, the embattled blue-dog in Pennsylvania’s 8th district, north of Philadelphia.

The problem, as Human Events reported, is that Newmark’s wealth was funded until recently from controversial “adult services” listings on the popular Craigslist.org classifieds website. The listings supplied nearly one-third of the site’s total revenues.

The section in question was removed recently after heavy scrutiny over the ethical and legal implications of a section some contended advanced international sex trafficking and exploitation of minors.

Among the politicians Craigslists’s founder has donated to is Pennsylvania’s Patrick Murphy, currently running behind challenger Mike Fitzpatrick by 15 points, according to the latest poll.

Murphy accepted a fairly modest $500 donation from Newmark. Of the roughly dozen politicians who have accepted Newmark’s donation, only Mary Jo Kilroy in Illinois is rejecting hers. She has given her donation to charity.

“It’s troubling that Patrick Murphy has not returned this money, given these new revelations,” Darren Smith, campaign communications director told Battle ‘10.

“You are bound to end up with dirty money like this when you take as many contributions from outside the district and outside of Pennsylvania as Patrick Murphy does.”

Human Events speaks with some of the parties involved in the debate here: