Many Democrats used social media to cheer President Obama’s decision to support same-sex marriage, while Republicans opponents have used their Twitter and Facebook accounts to denounce the move.

We rounded up reactions from both sides here:

The Fix: Obama’s gay-marriage gamble
The Fix: Why does gay marriage keep losing?
Reader reactions to Obama’s announcement on Twitter

View Photo Gallery: President Obama endorsed same-sex marriage Wednesday, making him the latest — and most prominent — U.S. politician to call for gay nuptials. Here are a few other prominent politicians who have supported gay marriage.