Missouri teens want to lower the voting age to 16 in local and school elections
(news.stlpublicradio.org)
i think it makes sense for voting age to be 16 at least in some cases; internationally it's not that weird of a policy. actually i think a big problem would just be the logistics of carrying it out: since the US doesn't inherently have distinct election dates for municipal, local, state, and federal elections, it's possible for all of them to be on the same ballot (meaning you could be eligible to vote in some races but not others and you'd be potentially committing a crime if you did).