Father Joseph O’Hare, the former longtime president of Fordham University and chairman of the city’s Campaign Finance Board, died on Sunday at the age of 89.

The Bronx-born priest was a civic institution in the 1980s and 1990s running one of the city’s most prominent universities and overseeing its campaign finance watchdog.

O’Hare was appointed to the CFB by Mayor Ed Koch in 1988 and famously dueled with both of his successors — Mayors David Dinkins and Rudy Giuliani.

He retired from both positions in 2003.

“Working closely with him, as I was privileged to do for some 15 years, was an experience next to none,” said the CFB’s former executive director, Nicole Gordon. “As a leader of troops, Joe’s sharp intelligence, political acumen, crushing wit, unquestionable loyalty, and (literally) priestly status gave us daily lessons on how to operate in public and in private, especially when the job is to be independent and fair in a volatile arena and without natural allies.”