Civil liberties advocates are sounding alarms over a bill that would allow Secretary of State Marco Rubio to revoke or deny passports for Americans accused of supporting terrorism, even without a conviction, The Intercept reported.

The measure, sponsored by Rep. Brian Mast, R-Fla., is part of a broader State Department reorganization and heads to a hearing Wednesday.

Critics say it could be used to punish speech, citing Rubio’s March decision to strip Turkish doctoral student Rümeysa Öztürk of her visa over an opinion piece critical of Israel.

“Marco Rubio has claimed the power to designate people terrorist supporters based solely on what they think and say,” said Seth Stern of the Freedom of the Press Foundation, calling the bill “thought policing at the hands of one individual.”

The ACLU’s Kia Hamadanchy warned the appeal process offers “no standard” and risks bypassing the courts entirely.

Read more at The Intercept.