advocate
Meaning: to argue in favor of something
Usage: Arnold advocated increasing national defense spending during the debate.
espouse
Meaning: to take up as a cause, support
Usage: I love animals so much that I espouse animal rights.
enfranchise
Meaning: to grant the vote to
Usage: The Nineteenth Amendment enfranchised women.
libertarian
Meaning: advocating principles of liberty and free will
Usage: The dissatisfied subjects overthrew the monarch and replaced him with a libertarian ruler who respected their democratic principles.
partisan
Meaning: a follower, adherent
Usage: The king did not believe that his rival could round up enough partisans to overthrow the monarchy.
canvass
Meaning: to solicit votes, opinions, or support; to examine carefully
Usage: Volunteers canvassed the neighborhood to learn which issues mattered most to voters.