New York City Mayor Bill de Blasio said he will immediately bring United States President Donald Trump to court if he proceeds to send federal agents to address an increase in violence.

“If he tried to do it, it would only create more problems, it would be counterproductive, we would immediately take action in court to stop him,” De Blasio said during a press conference.

De Blasio suggested avoiding overvaluing Trump’s statements, as “they are often not true.”

However, the mayor said that if Trump continued to send federal police to the city, he would take legal action against such actions.

“From my point of view, this would be another example of illegal and unconstitutional actions by the president, and we have often had to face it in court, and we generally won,” added the mayor.

Trump sent federal agents to the city of Portland, Oregon, last week to help curb civil unrest.

The move has drawn criticism after reports emerged that federal officials, without name badges or labels, detained protesters extrajudicially.

On July 20, Trump said he was looking to send more federal agents to other major U.S. cities experiencing a significant increase in violence, such as Chicago and New York.