The mayors of some of the nation's largest cities are promising to resist President Trump Donald John TrumpHR McMaster says president's policy to withdraw troops from Afghanistan is 'unwise' Cast of 'Parks and Rec' reunite for virtual town hall to address Wisconsin voters Biden says Trump should step down over coronavirus response MORE’s executive order stripping federal funds from municipalities that do not enforce federal immigration laws.

“[It’s an attack] on Boston’s people, Boston’s strength and Boston’s values,” Boston Mayor Marty Walsh (D) told reporters during a press conference Wednesday, according to USA Today. "If people want to live here, they’ll live here. They can use my office. They can any office in this building.”

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Chicago Mayor Rahm Emanuel (D), meanwhile, stated his city intends on openly operating as a sanctuary city.

“I want to be clear,” he said during a press conference in the nation’s third-largest city. "We’re going to stay a sanctuary city.”

“We welcome people, whether you’re from Poland or Pakistan, whether you’re from Ireland or India or Israel and whether you’re from Mexico or Moldova, where my grandfather is from, you are welcome in Chicago as you pursue the American Dream.”

Seattle Mayor Ed Murray (D), meanwhile, said that his city could withstand legal challenges from the Trump administration over the matter.

“This city will not be bullied by this administration,” he said Wednesday. "We believe we have the rule of law and the courts on our side.”

Trump repeatedly promised during his 2016 presidential campaign that sanctuary cities, which limit their cooperation with federal immigration agents, would no longer receive federal funds.