least 5,000 voting irregul irregularities. the frequent contributor to libertarian and conservative causes died earlier today. james rosen takes a look back. i wish he would have a program devoted to richard mellon. reporter: disenchanted after watergate with nixon the pennsylvania billionaire started investing more heavily in media, the arts and think tanks. he was not only a conservative, but he was a great philanthropist. he gave art to gallery, historical sites. reporter: he was a conservative. father of conservative think tanks like the american