No debate scheduled yet between PA U.S. Senate candidates

(Harrisburg) -- Less than four weeks until Election Day, Pennsylvania's U.S. Senate candidates have yet to even agree to the terms of a debate.

The League of Women Voters is trying to arrange a debate between Democratic Sen. Bob Casey and Republican challenger Tom Smith, but nothing was final so far today.

Compare that to Massachusetts, where the U.S. Senate candidates are squaring off for their third debate tonight.

Casey and Smith are running a low-profile campaign waged largely through TV ads that are costing millions of dollars.

Casey is a former state auditor general and treasurer who is seeking a second, six-year term. Smith is a newcomer to statewide campaigns who made a small fortune in western Pennsylvania's coal mining business and is largely self-financing his campaign.