During a press conference on Tuesday at the White House, he calls the state a crime-ridden "hell", and repeats that he will send the national guard there.
We're going in, says Trump.
He dismisses the criticism that he only uses the tactic in cities governed by the Democrats.
This is not about politics. I have a duty (to do this) when 20 people have been killed in the past two and a half weeks.
Illinois responds
The Governor of Illinois, J B Pritzker, responds on Tuesday that Chicago "does not want soldiers on our streets".
None of this is about making Chicago safer. Trump just wants to stretch the limits of power and create political drama to hide his own corruption, says Pritzker.
Trump's message comes shortly after Judge Charles Breyer in the federal district court in San Francisco ruled in a 52-page verdict that the Trump administration broke a law when 4,000 members of the national guard and 700 marines were called in to Los Angeles and ongoing protests against the US migration policy in June.
Broke the law
"In short: the defendants broke the Posse comitatus law", writes Breyer.
The law from 1878 prohibits a president from using the military in police matters in the USA.
However, Judge Breyer did not explicitly state that Trump must recall the summoned who are still on site. The verdict applies from Friday.
The trial has been going on for three days, where the plaintiff has been the state of California.
