Sen. Bernie Sanders Bernie SandersThe Hill's Campaign Report: Trump faces backlash after not committing to peaceful transition of power Bernie Sanders: 'This is an election between Donald Trump and democracy' The Hill's 12:30 Report: Trump stokes fears over November election outcome MORE (I-Vt.) used his campaign email list last week not to ask for donations but rather to warn voters in cities targeted for proposed Immigration and Customs Enforcement (ICE) raids by the Trump administration.

The informative email, first reported by Vox, was written by Belén Sisa, a Sanders campaign staffer and Deferred Action for Childhood Arrivals (DACA) program recipient, according to a copy shared with The Hill.

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The email, which came with the subject line "ICE raids targeting 10 cities start Sunday. Know your rights," includes graphics in English and Spanish outlining immigrant rights and asks voters to share it widely to spread the information ahead of the planned raids.

“It is no longer enough to talk about issues like immigration, we must take real action to fight back and protect our undocumented community,” Sisa told The Hill in an emailed statement. “Information is power and whether we are documented or undocumented, we all have rights protecting us from the injustices of Trump’s administration.”

President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE called for ICE raids that would have deported as many as 2,000 migrant families but ultimately delayed them for two weeks "at the request of Democrats" following a reported phone call with Speaker Nancy Pelosi Nancy PelosiPelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' On The Money: Anxious Democrats push for vote on COVID-19 aid | Pelosi, Mnuchin ready to restart talks | Weekly jobless claims increase | Senate treads close to shutdown deadline Trump signs largely symbolic pre-existing conditions order amid lawsuit MORE (D-Calif.)

Vox reports it's not the first time Sanders used his campaign list to mobilize without seeking donations.

Sanders has fairly consistently remained near the top of the crowded primary field since announcing his candidacy, trailing former Vice President Joe Biden Joe BidenPelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Hillicon Valley: Subpoenas for Facebook, Google and Twitter on the cards | Wray rebuffs mail-in voting conspiracies | Reps. raise mass surveillance concerns Fox News poll: Biden ahead of Trump in Nevada, Pennsylvania and Ohio MORE, who is the front-runner.

Sanders and Biden will participate in the second night of the first Democratic primary debate Thursday in Miami, along with eight other contestants. Ten more are debating Wednesday.

—Updated at 3:54 p.m.