This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. If an article link referred you here, you might want to go back and fix it to point directly to the intended page.
Pacheco was one of the first Hispanics to denounce slavery and pledge allegiance to the Union, and in the early 1860's he changed party affiliation to the Union Party.
In November 1876 Pacheco was elected to the U.S. House of Representatives by a margin of one vote.
Pacheco was seated on October 17, 1877 and was appointed to the Committee on Public Lands.