The city of Los Angeles joined Chicago, New York and other cities Tuesday in supporting Washington state’s efforts to block President Donald Trump’s revised travel ban limiting entry by refugees from Syria and visitors from six pre-dominantly Muslim countries.

City Attorney Mike Feuer announced the city’s participation in the amicus brief, which was submitted in support of Washington’s request for an existing injunction to be extended to a new version of Trump’s executive directive, which is set to go into effect on Thursday.

Trump’s first travel ban order was halted by a ruling that came as a result of a lawsuit by the state of Washington. The new order, which reduced an initial list of seven targeted countries to six and makes other changes, is aimed at circumventing that earlier injunction.

The amicus brief by Los Angeles and the other cities was filed as attorneys were anticipating a court action as early as Tuesday night.

Calling the revisions “window dressing,” Feuer argued that the changes “won’t magically transform a travel ban that’s unconstitutional at its core into a lawful order.”

“Los Angeles proudly stands with cities across the nation at this perilous time, when many of our nation’s most fundamental principles hang in the balance,” he said.

Mayor Eric Garcetti said in a statement that the “travel ban targets people indiscriminately and is far out of step with the values of religious tolerance and equality that we believe in as Americans.”

“Cities are coming together to lead this fight because we understand the urgency of working together to keep our country safe — and doing it in a way that honors our shared humanity, celebrates our diversity, and does not turn away from the ideals that define who we are,” he said.

The brief argues that the ban greatly affects cities like Los Angeles, New York and Chicago, which are “heavily dependent on the contributions of immigrants.” The cities also represent a population of 15.1 million and a fifth of the country’s gross domestic product, the brief said.

Los Angeles is home to 152,000 immigrants from the six targeted countries, with 136,000 hailing from Iran, 14,900 from Syria, 600 from Sudan, 500 from Somalia and 100 from Yemen, as of 2015, according to the brief.

Tourism dollars will also be affected, with Los Angeles visited by more than 160,000 visitors from the Middle East who generate $185 million in spending, according to the brief.

The cities participating in the amicus brief contend the travel ban is “as misguided as it is unconstitutional,” and describes it as being inspired by “anti-immigrant principles.”

The brief also contends that the revised travel ban makes cities like Los Angeles, Chicago and New York targets of terrorism, while treating Muslim immigrants as groups that are to be “distrusted and feared,” potentially leading to “hate crimes” against them.