Presidential candidates and U.S. Sens. Bernie Sanders (D-Vermont) and Elizabeth Warren (D-Mass.) have both taken to social media to signal their support for Little Rock School District teachers who plan to mount a one-day strike on Thursday.

On Facebook Sanders said, “Since my time at the University of Chicago I have stood against segregation. I’m proud to say our campaign stands with the students, parents and educators of Little Rock who are fighting against the re-segregation of their public schools.”

Here’s what Warren said on Twitter:

I stand with the Little Rock teachers making their voices heard for collective bargaining rights. We should be strengthening the voices of teachers in our public schools. https://t.co/wHS24mvaPi — Elizabeth Warren (@ewarren) November 13, 2019