The New York Times provides a thorough obituary. One quote of interest for third party junkies:
His greatest impact came through mobilizing his followers, sometimes called “Newmanites,” to build alliances with third parties, including that of the Texas independent H. Ross Perot.
“If it weren’t for the Independence Party, Mike Bloomberg might not have become mayor,” said Douglas Muzzio, a professor of public affairs at Baruch College.
In turn, Mr. Bloomberg supported the Independence Party’s goal of nonpartisan municipal elections and gave the party more than $650,000 of his own money. His administration arranged millions of dollars in bond financing in 2002 and 2006 for a building for Mr. Newman’s nonprofit All Stars Project, which uses the performing arts to help low-income children.
Newman founded a series of minor parties culminating in the New Alliance Party. This entity provided the ballot line for the 1988 presidential campaign of Lenora Fulani, whose campaign he managed.