I don’t know if Chris Evans is, I have not heard that myself.
It is the directors of the second and third Captain America movies, Anthony and Joe Russo, that are big lefties.
But even if Chris Evans is, he is smart enough to keep that to himself and let people enjoy his movies.
I left Winter Soldier thinking it was anti-Obama. Hydra was using Facebook and social media to invade people’s privacy, and preemptively kill anyone who would resist big brother. Seemed like destroying American exceptionalism.