E.J. Dionne: The first debate showed Democrats are far more in consensus than at odds

Elizabeth Warren began Wednesday night’s opening debate of the 2020 Democratic primary campaign physically occupying center stage. And substantively, the Massachusetts senator held that ground.It was not at all obvious that being the only one of the top five Democratic candidates in this first gaggle of 10 contenders would be an asset. Most of the drama has been reserved for Night Two, when former vice president Joe Biden will join Sens. Bernie Sanders and Kamala Harris, as well as Mayor P