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President Donald Trump fired Librarian of Congress Carla Hayden on Thursday, a source familiar with the situation told ABC News.

She was notified by an email from the White House Office of Personnel Management, a copy of which was obtained by ABC News.

"On behalf of President Donald J. Trump, I am writing to inform you that your position as the Librarian of Congress is terminated effective immediately. Thank you for your service," the email read.

The librarian of Congress serves a 10-year term, and Hayden's term was set to expire next year. Hayden has served in the position since 2016. She was the first woman to serve in the role.

Top Democrats condemned the move.

“Donald Trump’s unjust decision to fire Dr. Hayden in an email sent by a random political hack is a disgrace and the latest in his ongoing effort to ban books, whitewash American history and turn back the clock,” House Minority Leader Hakeem Jeffries said in a statement late Thursday.

Jeffries thanked Hayden for her service and said, “There will be accountability for this unprecedented assault on the American way of life sooner rather than later."

House Administration Committee Ranking Member Joe Morelle called the firing a “complete disgrace” and an “ignorant decision.”

“Tonight, President Trump fired a patriotic public servant. The Librarian of Congress, Dr. Carla Hayden, has spent her entire career serving people — from helping kids learn to read to protecting some of our nation’s most precious treasures. She is an American hero,” Morelle said in a statement late Thursday.

Morelle said he plans to introduce legislation to guarantee that the Librarian of Congress is appointed by Congress.
House Appropriations Ranking Member Rosa DeLauro said in a statement late Thursday that the move to fire Hayden “undermines the foundational principles of our democracy and erodes public trust in our institutions. The Trump Administration must provide a transparent explanation for this decision.”

“Every Member of Congress I know—Democratic or Republican—loves and respects Dr. Carla Hayden. A ‘fighter of freedom’ and a guardian of our nation’s truth and intellectual legacy, Dr. Hayden was just abruptly and callously fired by President Trump,” DeLauro added.

Trump is expected to announce her replacement as soon as tomorrow on his social media account. ABC News has reached out to the White House for comment.

-ABC News' Hannah Demissie, Katherine Faulders and Lauren Peller

A key group of New York House Republicans rejected a proposal from GOP leaders to raise the state and local tax (SALT) deduction cap to $30,000 in the "big, beautiful" bill that encompasses President Donald Trump's sweeping legislative agenda.

Reps. Elise Stefanik, Andrew Garbarino, Nick LaLota and Mike Lawler issued a scathing statement on Thursday, calling the offer "insulting" and saying that it creates "risks of derailing" Trump's agenda.

"New Yorkers already send far more to Washington than we get back -- unlike many so-called 'low-tax' states that depend heavily on federal largesse. A higher SALT cap isn't a luxury. It's a matter of fairness. We reject this offer," the lawmakers wrote.

The House Ways and Means Committee oversees the tax portions of the Republican package. The committee and GOP leaders have not released any specific details regarding the offer.

The SALT deduction cap is a key sticking point that is holding up progress on Trump's agenda bill.

-ABC News' Lauren Peller

President Donald Trump announced Judge Jeanine Pirro will be appointed interim United States Attorney for the District of Columbia on Truth Social on Thursday.

Pirro has hosted the Fox News show "Justice with Judge Jeanine," and Trump noted she previously was district attorney for Westchester County, New York, and a county judge.

"During her time in office, Jeanine was a powerful crusader for victims of crime," Trump posted. "Her establishment of the Domestic Violence Bureau in her Prosecutor's Office was the first in the Nation. She excelled in all ways.

"Jeanine is incredibly well qualified for this position, and is considered one of the Top District Attorneys in the History of the State of New York. She is in a class by herself. Congratulations Jeanine!" he added.

-ABC News' Kelsey Walsh

Following the Supreme Court ruling that allowed the Pentagon to proceed with the dismissal of transgender service members while legal challenges continue, Defense Secretary Pete Hegseth has issued a memo laying out a timeline for it to begin happening.

According to the memo, transgender service members who do not voluntarily separate from active-duty military service by June 6 will be dismissed after that date and transgender service members serving in the reserve forces have until July 7 to voluntarily separate.

Sean Parnell, the chief Pentagon spokesman and senior adviser, said in a statement that Hegseth is "encouraged" by the Supreme Court's decision.

-ABC News' Luis Martinez