David Leonhardt: Bernie Sanders is making a big mistake
(Nick Wagner | Austin American-Statesman via AP) Democratic presidential candidate Sen. Bernie Sanders, I-Vt., speaks during a campaign event on Sunday, Feb. 23, 2020, in Austin, Texas.
(Nick Wagner | Austin American-Statesman via AP) Democratic presidential candidate Sen. Bernie Sanders, I-Vt., speaks during a campaign event on Sunday, Feb. 23, 2020, in Austin, Texas.