Bugs Bunny: He has been a Democrat since growing up poor in the Bronx during the 1930's.However he supported the Vietnam War and both wars in Iraq because as he once said "of course you know this means war"
Daffy Duck: was a Left-winger in his young and crazy days but later become greedy and bitter and started to hate mexicans. (well one mexican mouse)
Mickey Mouse: A far right-winger who was a great friend of Reagan. In 1945 Mickey once talked about how the secular Jews run Hollywood
Kyle From South Park: A Democrat like his mom and dad.
Popeye: A Labor Dem in the old days, Popeye shocked many people when He voted Reagan over Carter (and become the very idea of a cartoon "Reagan democrat") However Popeye is a swing voter as he voted for Clinton twice.
Lisa Simpson: Liberal, However in one early ep she can be seen reading "The New Republic for kids" so maybe she has a hawkish side.
Foghorn Leghorn: Anti-war Democrat because he hates little chicken hawks