Mark Kirk just became the second Republican senator to come out in support of gay marriage, BuzzFeed reports. "Same-sex couples should have the right to civil marriage. Our time on this earth is limited," he wrote on his website today. "Life comes down to who you love and who loves you back—government has no place in the middle." Kirk, from Illinois, follows Rob Portman in switching positions; a third GOP senator, Lisa Murkowski, hasn't switched yet, but says her views are "evolving."
Another Democratic senator, Tom Carper from Delaware, also endorsed same-sex marriage today, the Washington Post reports. On his Facebook page, Carper cited the Golden Rule as his reason. With Carper's change of heart and Bob Casey's yesterday, just seven Democratic senators remain who have not endorsed gay marriage. On Slate, David Weigel speculates who might be next: Probably Florida's Bill Nelson, who isn't up for re-election until 2018 and is from a state that has voted Obama. Click for the rest of his predictions. (Read more Mark Kirk stories.)