In a speech that outlined [Elizabeth] Warren's vision for the party's future, the Massachusetts senator offered a series of policy prescriptions, calling on Democrats to push for Medicare for all, debt-free college or technical school, universal prekindergarten, a $15-an-hour minimum wage and portable benefits. She dug in against President Trump, saying Democrats would defend undocumented immigrants brought into the United States as children and that "we're never, ever going to build your stupid wall." And she celebrated the ascendant progressive wing's takeover of the party -- which has accelerated since November's election.
Lefty infighting has been the norm for so long that some progressives have come to view it as a permanent, vaguely endearing fact of life. In the Trump era, such an attitude is not worldly -- it is nihilistic. Non-Republicans -- ranging from veterans of Occupy Wall Street to the centrist Democrats in the Clinton and Obama mold -- have to decide if asserting their differences with robotic intensity is worth living under Republican control.