Hillary Clinton Hillary Diane Rodham ClintonFox News poll: Biden ahead of Trump in Nevada, Pennsylvania and Ohio Trump, Biden court Black business owners in final election sprint The power of incumbency: How Trump is using the Oval Office to win reelection MORE penned a letter to Teen Vogue contributor Lauren Duca encouraging the 26-year-old blogger and columnist to "continue writing and speaking out."

"As we know all too well, the Internet is not a friendly place for women, especially those who aren't afraid to speak their minds and challenge established systems of power," Clinton wrote. "And so I applaud you, and hope you will continue writing and speaking out. Your voice is so important."

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Duca posted a photo of the letter to Twitter on Friday, along with a message thanking the former Democratic presidential nominee.

"Thank you, @HillaryClinton. For this, and for everything. I promise to keep fighting (right after I'm done sobbing)," she tweeted.

Thank you, @HillaryClinton. For this, and for everything. I promise to keep fighting (right after I'm done sobbing). pic.twitter.com/3trk8yav2p — Lauren Duca (@laurenduca) June 9, 2017

Duca garnered attention in December after Teen Vogue published a scathing opinion piece she authored accusing President Trump of actively deceiving and manipulating American voters.

She also bitterly sparred on the air with Fox News host Tucker Carlson in December, calling him a "partisan hack." Carlson, in turn, told Duca that she "should stick to the thigh-high boots.”

The Fox News host later said he shouldn't have "lost control and snapped at her," though he also called her "not very impressive."

In January, news that controversial former pharmaceutical CEO Martin Shkreli, a self-declared Trump backer, was harassing Duca on Twitter gained traction. Shkreli has since been suspended from the social media site.