In politics, MacBride served a single term as a Republican member of the Vermont House of Representatives in the 1960s. When serving as a Republican presidential elector in Virginia in 1972, he defected from his pledged vote and became a faithless elector, casting a vote for the Libertarian Party's inaugural ticket of John Hospers for president and Tonie Nathan for vice president. Four years later, the party nominated him as their presidential candidate.
In politics MacBride served a single term as a Republican member of the Vermont House of Representatives in the 1960s When serving as a Republican presidential elector in Virginia in 1972 he defected from his pledged vote and became a faithless elector casting a vote for the Libertarian Party's inaugural ticket of John Hospers for president and Tonie Nathan for vice president Four years later the party nominated him as their presidential candidate