(snip)
The most recent round of independent polls shows that Mr. Santorum is arguably the most endangered senator in the country. Polls show that Robert P. Casey Jr., the state treasurer, holds a comfortable lead over Mr. Santorum — in a Quinnipiac University poll, Mr. Casey is in the lead by 18 points.
Mr. Santorum has insisted that voters do not really know much about Mr. Casey, that some Pennsylvanians actually believe the Democratic candidate is his father, former Gov. Robert P. Casey, who died six years ago.
"This is a guy recruited by the Democrats because he has a good name," Mr. Santorum said, after shaking hands at a Fourth of July fireworks display in Radnor.
Mr. Casey, in an interview, noted that he had run three statewide general election campaigns in recent years and served as state auditor general and treasurer. Moreover, he said, it is "really insulting to the people of Pennsylvania" to suggest that some voters still think he is his father.
http://www.nytimes.com/2006/07/10/washington/10santorum.html?hp&ex=1152504000&en=19fa743e5c79aad4&ei=5094&partner=homepage