Ronald Weiser

Ron Weiser
Chair of the Michigan Republican Party
In office
February 6, 2021  February 18, 2023
Preceded byLaura Cox
Succeeded byKristina Karamo
In office
February 11, 2017  February 23, 2019
Preceded byRonna McDaniel
Succeeded byLaura Cox
In office
February 1, 2009  January 29, 2011
Preceded bySaul Anuzis
Succeeded byBobby Schostak
Member of the University of Michigan Board of Regents
In office
January 1, 2017  January 1, 2025
Preceded byLaurence Deitch
Succeeded byCarl Meyers
United States Ambassador to Slovakia
In office
December 5, 2001  December 19, 2004
PresidentGeorge W. Bush
Preceded byCarl Spielvogel
Succeeded bySkip Vallee
Personal details
Born (1945-07-07) July 7, 1945
South Bend, Indiana, U.S.
Political partyRepublican
SpouseEileen Weiser (m. 1983-2021)
Children3
EducationUniversity of Michigan (BA)

Ronald N. Weiser (born July 7, 1945) is an American businessman, philanthropist, diplomat, politician, and political fundraiser. He is the founder of McKinley Associates Inc., a real estate investment company. From 2001 to 2004, he served as U.S. Ambassador to Slovakia under the George W. Bush administration. A major donor and financier for the Republican Party, Weiser played key fundraising roles in the presidential campaigns of George W. Bush, John McCain, and Donald Trump. He was elected to the University of Michigan Board of Regents in 2016, serving until 2025, and chaired the Michigan Republican Party during three separate terms (2009–2011, 2017–2019, and 2021–2023).