Pat Toomey's former home, the Club for Growth, is up once again with a broadcast and cable ad buy in Pennsylvania targeting the "laughably liberal" Joe Sestak in the Senate race. This time they take some of the more questionable projects funded by the stimulus package -- studies of ants and honeybees, and funding for puppet shows -- as an indictment of that controversial piece of legislation (which has had an impact on this race for a while now). The ad is below.
UPDATE: 5:12 p.m. It's important (and the Sestak campaign would like for you) to note that the aforementioned projects were funded by federal agencies with stimulus money, but the projects were not in the bill -- so Sestak didn't really vote for socially conscious puppet shows, though his vote did lead to socially conscious puppet shows. The Club for Growth's source is an article in The Hill newspaper on a report by Republican Sens. John McCain and Tom Coburn on stimulus money used for projects that were, in their view, frivolous.