A federal judge on Thursday dismissed an effort by six Republican-led states to block the Biden administration's plan to forgive student loan debt for tens of millions of Americans. And earlier Thursday, Supreme Court Justice Amy Coney Barrett rejected an appeal in another case brought by a Wisconsin taxpayers group seeking to stop the debt cancellation program.

U.S. District Judge Henry Autrey in St. Louis wrote that because the six states — Nebraska, Missouri, Arkansas, Iowa, Kansas and South Carolina — failed to establish they had standing, "the Court lacks jurisdiction to hear this case."

Suzanne Gage, spokeswoman for Nebraska Attorney General Doug Peterson, said the states will appeal. She said in a statement that the states "continue to believe that they do in fact have standing to raise their important legal challenges."

Democratic President Joe Biden announced in August that his administration would cancel up to $20,000 in education debt for huge numbers of borrowers. The announcement immediately became a major political issue ahead of the November midterm elections.

Barrett, who oversees emergency appeals from Wisconsin and neighboring states, did not comment in turning away the appeal from the Brown County Taxpayers Association. The group wrote in its Supreme Court filing that it needed an emergency order because the administration could begin canceling outstanding student debt as soon as Sunday.

In the lawsuit brought by the states, lawyers for the administration said the Department of Education has "broad authority to manage the federal student financial aid programs." A court filing stated that the 2003 Higher Education Relief Opportunities for Students Act, or HEROES Act, allows the secretary of education to waive or modify terms of federal student loans in times of war or national emergency.

"COVID-19 is such an emergency," the filing stated.

The Congressional Budget Office has said the program will cost about $400 billion over the next three decades. James Campbell, an attorney for the Nebraska attorney general's office, told Autrey at an Oct. 12 hearing that the administration is acting outside its authorities in a way that will cost states millions of dollars.

The plan would cancel $10,000 in student loan debt for those making less than $125,000 or households with less than $250,000 in income. Pell Grant recipients, who typically demonstrate more financial need, will get an additional $10,000 in debt forgiven.

Conservative attorneys, Republican lawmakers and business-oriented groups have asserted that Biden overstepped his authority in taking such sweeping action without the assent of Congress. They called it an unfair government giveaway for relatively affluent people at the expense of taxpayers who didn't pursue higher education.

Chris Nuelle, spokesman for Missouri Attorney General Eric Schmitt, said the plan "will unfairly burden working class families with even more economic woes."

Many Democratic lawmakers facing tough reelection contests have distanced themselves from the plan.

The HEROES Act was enacted after 9/11 to help members of the military. The Justice Department says the law allows Biden to reduce or erase student loan debt during a national emergency. Republicans argue the administration is misinterpreting the law, in part because the pandemic no longer qualifies as a national emergency.

Justice Department attorney Brian Netter told Autrey that fallout from the COVID-19 pandemic is still rippling. He said student loan defaults have skyrocketed over the past 2 1/2 years.

The cancellation applies to federal student loans used to attend undergraduate and graduate school, along with Parent Plus loans. Current college students qualify if their loans were disbursed before July 1.

The plan makes 43 million borrowers eligible for some debt forgiveness, with 20 million who could get their debt erased entirely, according to the administration.