One thing that occurs to me: think about the difference in Democratic speakers between tonight and the last time Democrats took back (some) power in Congress, in 2007. That year, Democrats designated Jim Webb, a newly elected senator from Virginia who was a white military veteran and economic populist, to rebut George W. Bush. This year, it was Abrams, a liberal African-American woman from Georgia who has championed Medicaid expansion and voting rights. The difference says a lot about how the party has changed in 12 years, and how it perceives the country having changed.