The liberal group Accountable America, which is advocating for greater oversight of Wall Street in the wake of the financial crisis, has a new ad in the NY-23 special election, targeting Conservative Party candidate Doug Hoffman's links to the right-wing Club For Growth.

"Will Doug Hoffman support real investigations?" the announcer says. "Hoffman's Wall Street-backed Club For Growth doesn't want bank investigations. Don't let the banks get away with it.

The group is spending $25,000 on the ad.