The Bernie Sanders Moment – WSJ

Michelle Obama provided the star power at Monday night’s opening of the Democratic Party convention, but the evening really belonged to Bernie Sanders. The Vermont socialist, so long a voice in the wilderness, was handed a prominent speaking slot to celebrate how much the party and Joe Biden have adopted his ideas for governing. He earned it.

Mr. Sanders failed a second time to win the nomination this year, foiled by the extraordinary turnout of older black voters in South Carolina for Mr. Biden. But in many ways the progressive…