This is a sure sign of desperation. While all campaigns use negative advertising, this kind of sludge being dished by Democrats across the country can only mean that they are without issues and without much hope.

New York Times:

As they struggle to break through with economic messages, many Democrats are deploying the fruits of a yearlong investigation into the business and personal histories of Republican candidates in an effort to plant doubts about them and avoid having races become a national referendum on the performance of President Obama and his party.

In Ohio, Representative Betty Sutton calls her Republican rival, Tom Ganley, a "dishonest used-car salesman" who has been sued more than 400 times for fraud, discrimination, lying to customers about repairs, overcharging them and endangering their safety. She warns voters, "You've heard the old saying, buyer beware!"

In Arizona, Representative Harry E. Mitchell accused his opponent David Schweikert of being "a predatory real estate speculator who snatched up nearly 300 foreclosed homes, been cited for neglect and evicted a homeowner on the verge of saving his house, just to make a buck."

In New York, Representative Michael Arcuri introduces his Republican challenger, Richard Hanna, as a millionaire who "got rich while his construction company overcharged taxpayers thousands, was sued three times for injuries caused by faulty construction and was cited 12 times for health and safety violations."