Bill de blasio
The Mayor Bill de Blasio spoke from a lectern which had #AlwaysNewYork written on it.Reuters

New York City Mayor Bill de Blasio on Monday said that he will sue the federal government if the US President-elect Donald trump's administration proceeds with its plan of asking all the Muslims to register in a database.

While delivering a speech on Monday at the Cooper Union in front of hundreds of his supporters, the mayor slammed many of Trump's controversial policies and said that if they are indeed implemented in the future, then "we will sue to block it."

Blasio's statement came a day after Trumps's Chief of Staff Reince Priebus made the announcement that not one of Trump's propositions made during his presidential campaign will be ruled out after he takes the office in January.

"The president-elect talked during the campaign about the movement that he had built. Now it's our turn to build a movement, a movement of the majority," De Blasio said.

The mayor spoke from a lectern which had #AlwaysNewYork written on it. The hashtag signified the New York values of unity and solidarity. He listed his promises to defend the citizens of New York from deportation, unconstitutional police practices and any cuts to federal funding for Planned Parenthood. "We will ensure women receive the healthcare they need," he said.

During his speech, he urged the crowd to "always be proud of our values."

De Blasio also promised to protect the Muslims in New York and said that he would not let the aggressive stop-and-frisk policing policy return in the city, which believes in and supports diversity.The NYC mayor, a Democrat, also pointed out that the former Secretary of State and Trump's rival presidential candidate was winning the popular vote by 1.5 million at last count.