In fundamental ways, the 2016 Democratic primary has been a litigation of the Obama years, and of whether the president's 2008 campaign vow of 'change we can believe in' succeeded or failed.

Of all the liberal resentments during the Obama years, one of the sharpest has been the failure to secure a public insurance option as part of the Affordable Care Act.

When he ran for president in 2008, Mr. Obama was the candidate of the young and the demographically ascendant. He eventually attracted strong majorities among African-Americans, Hispanics, Asian-Americans and voters under 30.

Joy Reid Quotes