Why is the FBI investigating the pizza delivery guy who left a note in the mail for President Donald Trump?

The FBI is investigating the man who left $5,000 to a pizzeria owner who is suing the president for defamation, the bureau said Tuesday.

“The FBI has received information regarding a person claiming to be the owner of an Orange County pizza shop that left a $5 million check in the mailbox to a restaurant owner in California,” FBI spokesman Christopher Allen said in a statement.

Allen did not elaborate on the person’s identity or name, but he said the FBI is continuing to investigate the alleged act.

Allen said the investigation is “still ongoing.”

The note was found at the front door of the store, where the FBI was called by a customer and the business owner said he was unaware the money was being deposited.

Allen added the FBI would not comment on the case without a court order.

“It’s a matter that is still under investigation,” Allen said.

Trump’s response to the note came during an interview with NBC’s Lester Holt on Tuesday night, and the president called the investigation “a witch hunt.”

Allen said that the FBI did not have “the authority to make such a determination.”

“The Department of Justice and FBI have always worked in a cooperative fashion to resolve matters that involve federal, state or local law enforcement officers,” Allen wrote in the statement.

“As we’ve seen over the past several months, we are a nation of laws, and we have no desire to engage in any kind of witch hunt or partisan witch hunt that would interfere with law enforcement work.”

Allen’s comments came just days after Trump’s former chief of staff, Reince Priebus, said the president was not being targeted because of his political leanings.

“If you ask any Republican member of Congress, I’d say he’s not being singled out because he’s a Republican, I would say,” Priebus told NBC News on Monday.

“He’s not the president of the United States of America, he’s the president,” Priebus said.

“People are saying he’s been investigated by the FBI because of political leaners.

And I think that’s absolutely false.

And so I think it’s just another example of how politicized this entire investigation is.”

The president has long been criticized for his treatment of law enforcement, with several former colleagues calling for his resignation.

Former President Trump defended his handling of the investigation in an interview on Fox News last month.

“I’m not a witch.

I’ve never been in trouble,” Trump said.

“It’s just a fact.

And the reason is I have great respect for law enforcement.

They do a great job, and they’re very professional, and there are very few things that you can do that you cannot get away with.”