Actress Susan Sarandon says it's "insulting" to tell women they should back 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 for president because of her gender.

“I don’t vote with my vagina,” she tweeted Wednesday. “It’s so insulting to women to think you would follow a candidate just because she’s a woman."

She added that rival candidate Sen. 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 (I-Vt.) represents her interests, not Clinton.

“I don’t vote with my vagina. It’s so insulting to women to think that you would follow a candidate JUST because she’s a woman.” (2/3) — Susan Sarandon (@SusanSarandon) February 17, 2016

HRC doesn’t rep my interests, @BernieSanders does. Simple as that. (3/3) — Susan Sarandon (@SusanSarandon) February 17, 2016

Sarandon backed Sanders’s Oval Office bid last month, citing his vote against authorizing the War in Iraq. Clinton voted to authorize the war as a senator from New York.

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“She failed me,” Sarandon said last month of Clinton's vote. "That wasn’t just a mistake. It was a disaster.”

Both campaigns are making a play for female voters as Sanders closes the gap with Clinton in national polls.

Sarandon made the comments after former Secretary of State Madeleine Albright, a Clinton supporter, sparked controversy earlier this month for saying “there’s a special place in hell for women who don’t support each other.”

Albright later apologized for choosing "the wrong context and the wrong time for using that line."

The Sanders campaign, though, has also had its own controversy.

Killer Mike, a rapper who backs Sanders, has faced criticism for saying Clinton’s gender does not entitle her to the White House.

“[A] uterus doesn’t qualify you to be president,” he said at Morehouse College in Atlanta on Tuesday night. Killer Mike said he was quoting a remarks from activist Jane Elliot.