Is Claire McCaskill's Support for Same-Sex Marriage a Sign of Things to Come?

Claire McCaskill announced her support for same-sex marriage on Sunday, the Washington Post reports. McCaskill, a Democratic U.S. senator from Kirkwood, made the announcement on her personal Tumblr blog

"I have come to the conclusion that our government should not limit the right to marry based on who you love," McCaskill wrote. "Good people disagree with me. On the other hand, my children have a hard time understanding why this is even controversial. I think history will agree with my children." 

In supporting same-sex marriage, McCaskill joins a growing list of politicians, including U.S. Sen. Rob Portman, a Republican from Ohio.

Same-sex marriage isn't a new issue to the Clayton and Richmond Heights communities. The cities and school districts have taken steps to protect gay and lesbian people. 

The city of Clayton added sexual orientation to its non-discrimination policy in Nov. 2011, and Richmond Heights followed in March 2012. The Clayton and Maplewood Richmond Heights school districts have similar protections in place.

In Jan. 2012, the city of Clayton also created a registry for domestic partnerships. (See related: Q&A: Clayton's Domestic Partnership Registry) 

Officials in Clayton and Richmond Heights have supported protections for gay and lesbian people for a few years now, but similar protections aren't guaranteed in some nearby cities, let alone across the state.

Does McCaskill's announcement signal possible change across Missouri? What do you think?