The 2020 Constitution Party presidential primaries were a series of primary elections determining the allocation of delegates in the selection of the Constitution Party's presidential nominee in the 2020 United States presidential election. On May 2, 2020, the Constitution Party nominated Don Blankenship for president and William Mohr for vice-president. Several state parties split from the national Constitution Party to nominate their own candidates.

Donald Leon Blankenship is an American business executive, political candidate, and convicted criminal. He was chairman and CEO of the Massey Energy Company—the sixth-largest coal company in the United States—from 2000 until 2010 when an explosion at Massey's Upper Big Branch Mine resulted in the death of 29 workers. He was imprisoned for 1 year for conspiring to violate federal mine safety standards.