Bernie Sanders has refused to curb his enthusiasm. Bernie Sanders is running on a campaign promising dramatically more left-wing domestic policies than Hillary Clinton. How will he get those policies passed when Republicans control Congress and would block even moderately liberal ones? That’s where the “political revolution†comes in. Sanders claims he can spark a massive upsurge in activism and political turnout, replacing the Republican-led Congress with one friendly to single-payer health insurance and other priorities that have historically lacked support. So far, turnout in the Democratic primary has lagged far behind its 2008 pace, casting severe doubt upon this...