Trump's feeling the heat of Mueller's investigation, and it shows.

Trump is not taking the news that the FBI raided his personal attorney’s office well.

In fact, he’s taking it very poorly and lashing out in truly Trumpian fashion.

On Monday, the FBI seized documents from the home and office of Michael Cohen, Trump’s longtime personal attorney and “fixer,” whose many fixes included paying $130,000 of hush money to porn star Stormy Daniels to keep her extramarital affair with Trump a secret.

According to Trump, that raid — for which federal prosecutors obtained a warrant — is not only “a disgrace,” but an “attack on our country.”

Trump ranted for several minutes: about special counsel Robert Mueller’s “witch hunt”; about Hillary Clinton’s emails, which are still being investigated, thanks to Republicans; and about a vague “they” who should be “looking at the other side.”

“Its a disgrace, it’s frankly a real disgrace,” he said. “It’s an attack on our country in a true sense. It’s an attack on what we all stand for.”

He called the raid “a whole new level of unfairness,” and launched into his familiar tirade of insisting there is no collusion.

“This is the most biased group of people,” he insisted. “These people have the biggest conflicts of interest I’ve ever seen.”

He also launched into a rant about Attorney General Jeff Sessions — insisting, as he has for the better part of a year — that Sessions never should have recused himself from the Russia investigation.

Not only is Sessions implicated in the Russia investigation, but he’s also been investigated for lying under oath about it.

Andrew McCabe, former deputy director of the FBI, whom Sessions fired just days before McCabe was set to retire, had authorized a criminal investigation into Sessions’ false statements to the Senate about his communications with Russian officials while he was advising Trump’s presidential campaign.

To Trump, though, it’s all just a “witch hunt.”

Asked whether he will fire Mueller, Trump said, “We’ll see what happens.”

Senate Minority Leader Chuck Schumer immediately issued a warning not to fire Mueller.

“Special counsel Mueller, a Republican, has uncovered a deep and detailed pattern of Russian interference in our elections that has led to indictments and guilty pleas,” Schumer said.

“The investigation is critical to the health of our democracy, and must be allowed to continue.”

Incredibly, some Republicans in Congress are still resisting calls to formally protect the Mueller investigation, waiting to see if it’s really necessary. Trump’s panicked rant and thinly veiled threat should make it clear they cannot afford to wait a minute longer.