2001 USA Patriot Act will do just fine!
“The United States of America will be designating ANTIFA as a Terrorist Organization,” the president said on Twitter.
Trump says Antifa will be designated a terrorist organization
The designation could put Antifa — short for anti-fascist — under the domestic terror label laid out in the 2001 USA Patriot Act, which allows federal law enforcement agencies to target the entire organization.
However there is no law on the books specifically against providing support to domestic terrorist organizations — unlike foreign terror groups.
Shortly after Trump’s tweet, Attorney General William Barr released a statement saying “violent radical elements” are hijacking legitimate protests to “pursue their own separate, violent, and extremist agenda.”
He said federal resources will be coordinated with state and local officials through the existing network of 56 regional FBI Joint Terrorism Task Forces to apprehend and charge “the violent radical agitators.”
The USA PATRIOT Act: Preserving Life and Liberty
(Uniting and Strengthening America by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism)
What is the USA Patriot Web