President Donald Trump told Salvadoran President Nayib Bukele he wanted to send "homegrown criminals" to El Salvador next and encouraged Bukele to build more prisons.
Homegrown criminals. He wants to deport US citizens (explicitely rather than "accidentally")
Edit: And don't fool yourself, this will happen without due process.
"Criminal" just means the Trump administration accuses you of being a criminal, rather than it actually needing to be proven in court that you broke the law.