As Joe Biden closes in on his choice of a vice-presidential running mate, Democrats in Tuesday’s primaries sent a clear message about what a winning Democratic coalition would look like. Wins for several black progressives in New York congressional primaries, including Jamaal Bowman’s defeat of House Foreign Affairs Chairman Rep. Eliot L. Engel, and, in Kentucky, Charles Booker’s possible win over establishment-backed Amy McGrath in the Senate primary, showed that candidates who unite voters of color and white progressives are the party’s future. If Biden wants to show he’s listening to these voters, there’s one name that apparently isn’t on his current vice-presidential shortlist, but should be: Rep. Barbara Lee (D-Calif.).