Democratic Colorado Gov. Jared Polis will stop sending migrants to New York City, Chicago and other major Democrat-run cities after mayors expressed outrage at the plan in recent weeks.

Polis had agreed to work with local authorities in Denver to help send migrants to their final destinations. While Colorado is not a border state, it has seen a major influx of migrants seeking passage to elsewhere in the country. Mayors Eric Adams of New York City and Lori Lightfoot of Chicago called on Polis to end his assistance last week as their cities also struggle with a surge in migrants.

"People fleeing violence and oppression in search of a better life for themselves and their families deserve our respect not political games and we are grateful we have been able to assist migrants to reach their final destination," Polis had said of the program. "We refuse to keep people against their will if they desire to travel elsewhere."

Adams and Lightfoot wrote to Polis in a joint letter, urging him to halt his bussing program after it sent just a few hundred migrants.

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"We have seen your statements in the media that you are simply accommodating the wishes of migrants to come to cities like New York City and Chicago," the pair wrote. "However, you are sending migrants and families to New York City and Chicago that do not have any ties, family members or community networks to welcome them."

Adams was outraged at Polis' bussing program during a press conference appearance last week, comparing it to similar programs that Texas Gov. Greg Abbott and Florida Gov. Ron DeSantis used to flood his city with some 30,000 migrants last year.

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"One time we had to deal with Republican governors sending migrants to New York. Now we’re dealing with Democratic governors sending migrants to New York," Adams said Wednesday.

"What’s callous is how we have been ignored as a city. And now I have to make tough decisions on the resources of New York … it is time for the federal government to step up," he added.

Adams' plea for federal assistance comes as President Biden makes his first trip to the U.S.-Mexico border Sunday. The White House also unveiled a handful of policies aimed at stemming the flow at the border last week. They include expanding a humanitarian parole program for Venezuelan nationals to include Haitians, Cubans and Nicaraguans, as well as increasing refugee resettlements.

Biden acknowledged the changes aren't up to the task, however.

"These actions alone that I'm going to announce today aren't going to fix our entire immigration system but they can help us a good deal in managing what is a difficult challenge," he said Thursday.

Homeland Security Secretary Alejandro Mayorkas on Sunday said he will not resign over his handling of the border crisis and insisted he will be ready for future investigations by House Republicans while continuing to fulfill his daily responsibilities.

During an appearance on ABC's "This Week," Mayorkas previewed President Biden's visit to El Paso, Texas later in the afternoon and was pressed by anchor George Stephanopoulos to respond to House Speaker Kevin McCarthy's call for him to resting and whether he has any intentions of doing so.

"I do not. I've got a lot of work to do, and we're going to do it," Mayorkas said.

"If Secretary Mayorkas does not resign, House Republicans will investigate every order, every action and every failure will determine whether we can begin impeachment inquiry," McCarthy said in November while visiting El Paso.

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The DHS Secretary, who said Sunday that the border crisis is "something that is not unique to the United States," was then asked whether he was prepared for House Republicans to investigate DHS and him, prompting him to say, "I am, I will be, and I'll continue to do my work throughout them."

Mayorkas has faced criticism for several months over his handling of the border crisis, with border patrol agents telling Mayorkas early last year that policies "aren’t working." Fox News Digital reported in November that internal DHS emails from early 2022 described a "rough" meeting between Mayorkas and Border Patrol. Morale has continued to be an issue among Border Patrol agents, as they have faced a relentless crisis at the southern border – which many continue to blame on the policies of the Biden administration.

The Biden administration saw numbers spike under its watch, with more than 1.7 million encounters in fiscal year 2021. The situation got worse in fiscal 2022, with more than 2.3 million encounters. So far in fiscal 2023, numbers for the first two months have outpaced those from the same time period in 2022.

The border has also faced uncertainty surrounding Title 42, a Trump-era policy enacted at the beginning of the COVID-19 pandemic. That order allows for the rapid expulsion of migrants at the border and has been used by both the Trump and Biden administrations to expel hundreds of thousands of migrants.

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A DHS spokesperson defended Mayorkas in a statement to Fox News Digital back in November after McCarthy's comments, saying lawmakers can "do better than point the finger at someone else" for the problems at the southern border.

"Secretary Mayorkas is proud to advance the noble mission of this Department, support its extraordinary workforce, and serve the American people," a DHS spokesperson told Fox News Digital at the time. "The Department will continue our work to enforce our laws and secure our border, while building a safe, orderly, and humane immigration system."

Last month, 20 House Republicans demanded that the Republican-controlled House push for impeaching Mayorkas with Rep. Lauren Boebert, R-Colo., accusing Mayorkas of misleading Congress by testifying under oath that the border was under control. 

"He regularly lies to the American people, claiming that the southern border is closed," she said. "I've been there. It's wide open."

While many Republicans have been vocal about impeaching Mayorkas, any such efforts are likely to stall in a narrowly-divided House and Democrat-controlled Senate.

Fox News Digital's Adam Shaw and Haris Alic contributed to this report.