Tierney continued his political activism in the 1990s and early 2000s by donating to local and national campaigns and headed
George W. Bush's outreach to Catholics in the
2000 Presidential Election. Tierney was credited with helping generate votes for Bush and helping him win important states like Ohio and Missouri. Tierney also frequently appeared as a conservative voice on
WPVI-TV's
Inside Story. In 2003 Tierney headed
Sam Katz's third campaign for mayor of Philadelphia, which he lost to incumbent mayor
John F. Street. During the campaign, Tierney was involved in a highly publicized dispute with Neil Oxman. Oxman was a political consultant and friend of Sam Katz who worked on Katz's 1999 run for mayor. Oxman left Katz's 2003 campaign because he was unable to work with Tierney, saying Tierney was a "shameless self-promoter" and "full of bullshit". Katz praised Tierney, who he said was full of optimism, which Katz said was a great asset when things were going poorly in the campaign and in Katz's personal life. A member of the board for
NutriSystem, Tierney played an important role in the company's turnaround with the decision to dramatically increase the marketing budget. He is a member of both the
American Academy of Arts and Sciences and the
American Philosophical Society. The
Pennsylvania Report named him to the 2009 "The Pennsylvania Report 100" list of influential figures in Pennsylvania. In 2002, he was named to the
PoliticsPA list of politically influential individuals. In 2003, he was named the
PoliticsPA list of politically influential individuals, where he was called a "potential statewide candidate in 2004." ==Notes==