The State Department has revoked over 250,000 visas under Trump for criminal activity, fraud, birth tourism and national security threats.
https://www.foxnews.com/us/state-department-revokes-250000-visas-broad-immigration-vetting-crackdown
https://www.foxnews.com/us/state-department-revokes-250000-visas-broad-immigration-vetting-crackdown