I’m an American citizen, but have never lived in the USA? Can I vote?

PERHAPS. Voting is implemented through the individual states, and there are thus variations in legislation. There is an increasing tendency to permit Americans who have never lived in the US to vote in federal elections (administered by states); this is now possible in 37 of the 50 states. Generally, you are allowed to vote in the state where at least one of your citizen-parents last resided. See: www.fvap.gov/citizen-voter/reside. ACA is in favor of extending voting rights to all US citizens residing abroad.