President Trump announced on Monday that he was firing the chair of the Tennessee Valley Authority and called for the ouster of its CEO after lambasting the federally owned corporation for hiring foreign workers and allowing the CEO to make what the president has recently called a “ridiculous” salary.

Trump told reporters at the White House that he was formally removing chair Skip Thompson and another member of the board, and he threatened to remove other board members if they continued to hire foreign labor. Thompson was appointed to the post by Trump.

The TVA is a federally owned corporation created in 1933 to provide flood control, electricity generation, fertilizer manufacturing and economic development to the Tennessee Valley, a region that was hard hit by the Great Depression. The region covers most of Tennessee and parts of Alabama, Mississippi and Kentucky, as well as small sections of Georgia, North Carolina and Virginia.

The president also said the TVA board must immediately hire a new chief executive officer who “puts the interests of Americans first." According to Trump, the CEO, Jeff Lyash, earns $8 million a year.

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"It's ridiculous," Trump said in April. "Has to be the highest-paid man in any government (position). Makes approximately $8 million or $9 million. I don't know the gentleman, but he's got a heck of a job. He gets paid a lot of money."

Lyash last year was paid a recruitment and relocation incentive of nearly $1.8 million – raising his salary to $8.12 million in his first six months on the job, provided he stays for at least the next five years, according to regulatory filings released by TVA.

“The new CEO must be paid no more than $500,000 a year,” Trump said Monday. “We want the TVA to take action on this immediately. ... Let this serve as a warning to any federally appointed board: If you betray American workers, you will hear two words: ‘You’re fired.’”

Trump said the authority was replacing many of its in-house technology workers with contractors who rely heavily on foreign workers under the H1-B visa program for highly skilled workers.

“All TVA employees are U.S. based citizens,” said authority public information officer Jim Hopson. “All jobs related to TVA’s Information Technology department must be performed in the U.S. by individuals who may legally work in this country.”

“As a federal corporation, TVA’s board members serve at the pleasure of the president,” Hopson added.

As Trump was meeting with workers who would shortly be laid off by the authority, he was passed a note from chief of staff Mark Meadows that said Lyash had called the White House and was promising to address the labor concerns. Some of the attendees, who are set to see their last paycheck at the end of the month, teared up as Trump read the message.

Trump acknowledged that he was made aware of the issue after seeing a television ad produced by U.S. Tech Workers, a nonprofit that wants to limit visas given to foreign technology workers. The ad aired in primetime on Fox News.

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The group, led by Kevin Lynn, criticized the TVA for furloughing its own workers and replacing them with contractors using foreign workers with H-1B visas. The ad, Lynn said, had an “audience of one," aiming to persuade Trump to stop the TVA from outsourcing much of its information technology division.

Trump made the announcement as he signed an executive order to require all federal agencies to complete an internal audit to prove they are not replacing qualified American workers with people from other countries. The White House said the order will help prevent federal agencies from unfairly replacing American workers with lower-cost foreign labor.

The order followed the TVA’s announcement that it would outsource 20% of its technology jobs to companies based in foreign countries. TVA’s action could cause more than 200 highly skilled American tech workers in Tennessee to lose their jobs to foreign workers hired on temporary work visas, according to the White House.

But Republican Sen. Lamar Alexander of Tennessee said the TVA doesn't get any taxpayer money. Commenting on the issue in April, Alexander said the White House was spreading misinformation. He said that TVA chief executive officers' pay is lower than other large utilities and that TVA energy rates are among the lowest in the nation.

The Associated Press contributed to this report.