“Disinformation and online foreign interference erode our democracy, and Donald Trump has invited both,” Warren said in a Tweet Wednesday. “Anyone who seeks to challenge and defeat Donald Trump in the 2020 election must be fully prepared to take this on – and I’ve got a plan to do it.”

Warren proposed to combat disinformation by holding big tech companies like Facebook, Twitter and Google responsible for spreading misinformation designed to suppress voters from turning out.

“I will push for new laws that impose tough civil and criminal penalties for knowingly disseminating this kind of information, which has the explicit purpose of undermining the basic right to vote,” Warren said in a press release.