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I believe that a candidate cannot have ads refused. So someone running for office in any political subdivision of Carney's congressional district could conceivably run the ads.
I was involved in trying to get local cable to run anti war on drugs ads back in the 90s - See this posting from usenet/dejaNews:
http://groups.google.com/group/misc.activism.progressive/browse_thread/thread/a88d200dc484796e/fd62097783d03c43?hl=en&lnk=st&q=#fd62097783d03c43