Trump signed an executive order on January 25 to prevent federal agencies from granting grants to asylum-seeking cities that protect undocumented immigrants and do not cooperate with federal law enforcement agencies.

US President Donald Trump will take decisive action against "sanctuary cities" across the United States, he declared.

As promised during his campaign, Donald Trump launched the battle Wednesday against so-called "sanctuaries" for illegal immigrants, signing a decree to deprive them of federal funds.

The president reaffirmed Wednesday his willingness to have the wall financed at the border by Mexico and signed a decree calling for sanctioning cities that protect migrants.

President authorized its construction on the border with Mexico of almost 3,200 kilometers.

"We will protect all of our people no matter where they come from," said New York Mayor Bill de Blasio

As promised in his election campaign, President Donald Trump opened fire on Wednesday against the "sanctuary cities" of the United States that protect undocumented immigrants from deportation, whom they want to deprive of federal funds.

New York and Los Angeles, the two largest sanctuary cities in the United States, pledged on Wednesday to resist Donald Trump and continue to protect his illegal immigrants.