In the latest issue of JLA Classified Green Lantern, "Square John" Stewart, tells us that he is indeed a liberal.
Upon the arrival of Kid Amazo, the Flash insists upon destroying the new cyborg villain and quickly so they can go out and get some dinner.
Green Lantern responds:
"You know I'm a liberal by inclination. But on this one... I'm with the Flash"
Our heroes from the Justice League of America later agree to try and reprogram the kid from Professor Ivo's evil plans because all lifeforms are to be treated humanely.
As Wonder Woman says unto us,
"Every sentient creature has the right-- and the responsibility-- to determine it's own destiny."
Green Lantern, Flash, Wonder Woman, Liberals, Justice League of America