Robert Reich, who worked in the Gerald Ford and Jimmy Carter administrations and was Secretary of Labor under Bill Clinton William (Bill) Jefferson ClintonD-Day for Trump: September 29 Trump job approval locked at 42 percent: Gallup If Trump doesn't know why he should be president again, how can voters? MORE, endorsed Bernie Sanders Bernie SandersMcConnell accuses Democrats of sowing division by 'downplaying progress' on election security The Hill's Campaign Report: Arizona shifts towards Biden | Biden prepares for drive-in town hall | New Biden ad targets Latino voters Why Democrats must confront extreme left wing incitement to violence MORE on Twitter Friday evening.

The economist and author has written in support of Sanders and his economic plans, calling Hillary Clinton Hillary Diane Rodham ClintonHillicon Valley: FBI chief says Russia is trying to interfere in election to undermine Biden | Treasury Dept. sanctions Iranian government-backed hackers The Hill's Campaign Report: Arizona shifts towards Biden | Biden prepares for drive-in town hall | New Biden ad targets Latino voters FBI chief says Russia is trying to interfere in election to undermine Biden MORE's proposals too modest, but previously stopped short of officially endorsing Sanders.

In a statement posted to Facebook, Reich wrote: "I have the deepest respect and admiration for Hillary Clinton, and if she wins the Democratic primary I’ll work my heart out to help her become president. But I believe Bernie Sanders is the agent of change this nation so desperately needs."