How something is described often affects how people react to it. So it's interesting, as the Supreme Court begins two days of arguments on how to and who can define marriage, to see how the lawmakers across the street have talked about the same issue.

A look through Sunlight's Capitol Words shows a clear partisan divide: Democrats tend to use the term "gay marriage" while Republicans prefer "same-sex marriage."  As you can see in the chart above, the latter term occurs more frequently in congressional debate. The full Capitol Words analysis gives us the party breakdown: Democrats account ...