David Nolan, who helped found the Libertarian Party in his Denver home and watched it grow into a force with national influence, died unexpectedly Sunday. The Tucson resident was 66.
Nolan, whose friends described him as a "guiding light" of the Libertarian Party, opposed expansive government and had pledged to abolish personal income taxes if elected to office.
In 2006, Nolan unsuccessfully ran against Gabrielle Giffords for a seat in Arizona's 8th Congressional District.
This year, he challenged John McCain for his Senate seat and racked up 63,000 votes - in a state with only 24,000 registered Libertarians.