Pat Buchanan threatened in 1996 to run as the U.S. Taxpayers Party candidate if Bob Dole chose a pro-choice running mate. Dole later chose pro-life Jack Kemp and received Buchanan's endorsement. Buchanan's Reform Party running mate Ezola B. Foster switched her membership to the Constitution Party in 2002. Buchanan stated on the September 7, 2004 edition of Hardball with Chris Matthews, "There is a chance I would vote for Peroutka." However, he later penned an endorsement of President George W. Bush in the pages of The American Conservative.
US Senator Bob Smith announced his switch from Republican to the U.S. Taxpayers Party in 1999 to seek its 2000 presidential nomination. Smith
later claimed that anti-New World Order ideologues within the party resisted his candidacy due to his Roman Catholicism. He
continued his campaign as a non-partisan independent but ceased the campaign soon thereafter and returned to the Republican
Party to assume a Senate committee chairmanship. In 2008, he began writing editorials on the Constitution Party's website,
fueling speculation that he would seek its Presidential nomination again, although he had endorsed Rep. Duncan Hunter for
the Republican nomination. He requested that his name be withheld from consideration in a March 2008 letter to CP supporters.