Senator Elizabeth Warren is working on a sweeping cryptocurrency bill that would give most cryptocurrency regulatory authority to the Securities and Exchange Commission, according to sources close to her.

“As Senator Warren has already said publicly, she’s working on crypto legislation and believes that financial regulators, including the SEC, have broad existing authority to crack down on crypto fraud and illegal money laundering,” Alex Sarabia, a Warren spokesperson, said in a statement to Semafor.

Warren’s office is investigating crypto-related issues, including taxation, regulation, climate, and national security, according to details by Semafor, which “could change.”