Democratic presidential candidate Bernie Sanders Bernie SandersKenosha will be a good bellwether in 2020 Biden's fiscal program: What is the likely market impact? McConnell accuses Democrats of sowing division by 'downplaying progress' on election security MORE is taking a tough stance against the Obama administration's plan to begin a surge in deportations of illegal immigrants with a new petition sent to supporters Saturday.

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In an email, Sanders mentions his father, who immigrated to the U.S. from Poland in 1921, and said thousands of women and children have fled Latin America over the last several years.

"Sending women and children back into harm's way after they already fled horrendous violence in Central America is painful and inhumane, and must be stopped," the email reads.

The petition asks President Obama to "protect families by extending Temporary Protective Status for those who fled from Central America."

Earlier this week, it was reported that the Obama administration is planning a new wave of deportation raids in May and June focused on recently immigrated women and children.

Sanders and Democratic rival Hillary Clinton Hillary Diane Rodham ClintonWhat Senate Republicans have said about election-year Supreme Court vacancies Bipartisan praise pours in after Ginsburg's death Trump carries on with rally, unaware of Ginsburg's death MORE immediately spoke out against the plan.