President Donald Trump previewed an executive order to “dismantle” domestic left-wing terrorist networks after a gunman killed a detainee at a Dallas Immigration and Customs Enforcement facility on Wednesday.

“The continuing violence from Radical Left Terrorists, in the aftermath of Charlie Kirk’s assassination, must be stopped. ICE Officers, and other Brave Members of Law Enforcement, are under grave threat. We have already declared ANTIFA a Terrorist Organization, and I will be signing an Executive Order this week to dismantle these Domestic Terrorism Networks,” Trump said in a Truth Social post.