Why the Center-Left Became Immoderate

In polarized times, those without a clear guiding ideology become the most vicious partisans.

Democracy dies when one side loses respect for electoral outcomes and comes to consider the other illegitimate. Recent U.S. presidents, at least since Bill Clinton, have faced a degree of implacable opposition from the further reaches of the opposing party. But of late the problem seems to have intensified—and disrespect for democratic outcomes has become particularly acute on the center-left.

.. But although centrists are by definition skeptical of ideology, that does not make them any less prone to partisanship.

.. In polarized times, political competition comes to resemble tribal warfare. Everyone is under pressure to close ranks and boost morale.

.. Before being appointed to succeed Mrs. Clinton in the Senate, Kirsten Gillibrand was an upstate New York representative who belonged to the Blue Dog Coalition.

.. Many Democrats are unwilling to accept that Mrs. Clinton actually lost to Donald Trump. Those who find her standard center-left technocratic worldview congenial are disinclined to accept ideological explanations, so they look for scapegoats: Russia, James Comey, even the voters who supported Donald Trump.

.. Contrast the centrists with leftist standard-bearers like Sens. Bernie Sanders and Elizabeth Warren. They’re no fans of Mr. Trump, but they haven’t been at the forefront of calls for impeachment or intensifying the Russia investigation. Instead, they have focused their efforts on broadening the Democratic Party’s base with a more inclusive populism that takes seriously the systemic causes of inequality

.. Both have resisted the urge to write off Mr. Trump’s supporters, and Mr. Sanders in particular has made outreach to Republicans a major part of his postelection message. Mr. Sanders seems instinctively uncomfortable with identity politics,

.. People want something to believe in, but in the absence of a strong ideological sensibility among Democrats, partisanship and alarmism offer ready recourse. Having an enemy is a powerful motivator, and hating Mr. Trump is entertaining to boot.

.. Yesterday’s centrists have become some of today’s most intense partisans.