Well the love is gone between Matt Damon and Barack Obama.  When asked about the actors recent criticism of the president in an interview with BET, he said "He broke up with me", then explained why.

Damon said,

There are a lot of things that I really question, you know: the legality of the drone strikes, and these NSA revelations they’re, you know, it’s like, they’re, you know, Jimmy Carter came out and said we don’t live in a democracy. That’s, that’s a little, that’s a little intense when an ex-president says that. So, you know, he’s got some, some explaining to do, particularly for a constitutional law professor."

Here's video of the interview,