President Donald Trumpsigned an executive order Thursday calling for the dismantling of theU.S. Education Department, advancing a campaign promise to take apart an agency thats been a longtime target of conservatives.Trump has derided the Education Department as wasteful and polluted by liberal ideology. However, completing its dismantling is most likely impossible without an act of Congress, which created the department in 1979. Republicans said they will introduce legislation to achieve that, while Democrats have quickly lined up to oppose the idea.The order says the education secretary will, to the maximum extent appropriate and permitted by law, take all necessary steps to facilitate the closure of the Department of Education and return authority over education to the States and local communities.It offers no detail on how that work will be carried out or where it will be targeted, though the White House said the agency will retain certain critical functions.Trump said his administration will close the department beyond its core necessities, preserving its responsibilities for Title I funding for low-income schools, Pell grants and money for children with disabilities.The White House said earlier Thursday the department will continue to manage federal student loans, but the order appears to say the opposite. It says the Education Department doesnt have the staff to oversee its $1.6 trillion loan portfolio and must return bank functions to an entity equipped to serve Americas students.At a signing ceremony, Trump blamed the department for Americas lagging academic performance and said states will do a better job.Its doing us no good, he said.Already, Trumps Republican administration has been gutting the agency. Its workforce is beingslashed in half, and there have beendeep cutsto the Office for Civil Rights and the Institute of Education Sciences, which gathers data on the nations academic progress.Education Secretary Linda McMahon said she will remove red tape and empower states to decide whats best for their schools. But she promised to continue essential services and work with states and Congress to ensure a lawful and orderly transition.Part of her job will be exploring which agencies can take on the Education Departments various roles, she said.The Department of Justice already has a civil rights office, and I think that there is an opportunity to discuss with Attorney General Bondi about locating some of our civil rights work there, McMahon told reporters after the signing.The measure was celebrated by groups that have long called for an end to the department.For decades, it has funneled billions of taxpayer dollars into a failing system one that prioritizes leftist indoctrination over academic excellence, all while student achievement stagnates and America falls further behind, said Kevin Roberts, president of the Heritage Foundation.Advocates for public schools said eliminating the department would leave children behind in afundamentally unequaleducation system.This is a dark day for the millions of American children who depend on federal funding for a quality education, including those in poor and rural communities with parents who voted for Trump, NAACP President Derrick Johnson said.Opponents are already gearing up for legal challenges, including Democracy Forward, a public interest litigation group. Senate Minority Leader Chuck Schumer, D-N.Y., called the order a tyrannical power grab and one of the most destructive and devastating steps Donald Trump has ever taken.Margaret Spellings, who served as education secretary under Republican President George W. Bush, questioned whether whether the department will be able to accomplish its remaining missions, and whether it will ultimately improve schools.Will it distract us from the ability to focus urgently on student achievement, or will people be figuring out how to run the train? she asked.Spellings said schools have always been run by local and state officials, and rejected the idea that the Education Department and federal government have been holding them back.Currently, much of the agencys work revolves around managing money both its extensive student loan portfolio and a range of aid programs for colleges and school districts, like school meals and support for homeless students. The agency also is key in overseeingcivil rights enforcement.The Trump administration has not addressed the fate of other department operations, like its support for for technical education and adult learning, grants for rural schools and after-school programs, and a federal work-study program that provides employment to students with financial need.States and districts already control local schools, including curriculum, but some conservatives have pushed to cut strings attached to federal money and provide it to states as block grants to be used at their discretion.Block granting has raised questions about vital funding sources including Title I, the largest source of federal money to Americas K-12 schools. Families ofchildren with disabilitieshave despaired over what could come of the federal departments work protecting their rights.Federal funding makes up a relatively small portion of public school budgets roughly 14%. The money often supports supplemental programs for vulnerable students, such as the McKinney-Vento program for homeless students or Title I for low-income schools.Republicans have talked about closing the Education Department for decades, saying it wastes money and inserts the federal government into decisions that should fall to states and schools. The idea has gained popularity recently as conservative parents groups demand more authority over their childrens schooling.In his platform, Trump promised to close the department and send it back to the states, where it belongs. Trump has cast the department as a hotbed of radicals, zealots and Marxists who overextend their reach through guidance and regulation.Even as Trump moves to dismantle the department, he has leaned on it to promote elements of his agenda. He has used investigative powers of the Office for Civil Rights and the threat of withdrawing federal education money to target schools and colleges that run afoul of his orders ontransgender athletes participating in womens sports, pro-Palestinian activism and diversity programs.Sen. Patty Murray of Washington, a Democrat on the Senate Committee on Health, Education, Labor and Pensions, dismissed Trumps claim that hes returning education to the states. She said he is actually trying to exert ever more control over local schools and dictate what they can and cannot teach.Even some of Trumps allies have questioned his power to close the agency without action from Congress, and there are doubts about its political popularity. The House considered an amendment to close the agency in 2023, but 60 Republicans joined Democrats in opposing it.By COLLIN BINKLEY and CHRIS MEGERIAN Associated PressAssociated Press writer Seung Min Kim contributed to this report