Donald Trump Jr. Don John Trump'Tiger King' star Joe Exotic requests pardon from Trump: 'Be my hero please' Zaid Jilani discusses Trump's move to cancel racial sensitivity training at federal agencies Trump International Hotel in Vancouver closes permanently MORE ripped former White House chief strategist Stephen Bannon on Wednesday after a leaked excerpt from an upcoming book quoted Bannon as calling Trump Jr.'s infamous Trump Tower meeting "treasonous" and "unpatriotic."

In a tweet, Trump Jr. wrote that Bannon is "not a strategist, he is an opportunist."

"Steve had the honor of working in the White House & serving the country," Trump Jr. said. "Unfortunately, he squandered that privilege & turned that opportunity into a nightmare of backstabbing, harassing, leaking, lying & undermining the President."

"Steve is not a strategist, he is an opportunist," Trump Jr. finished.

Steve had the honor of working in the White House & serving the country. Unfortunately, he squandered that privilege & turned that opportunity into a nightmare of backstabbing, harassing, leaking, lying & undermining the President. Steve is not a strategist, he is an opportunist — Donald Trump Jr. (@DonaldJTrumpJr) January 3, 2018

The White House declared war on Bannon Wednesday over quotes in a forthcoming book by Michael Wolff detailing the inner workings of the first days of the Trump administration.

ADVERTISEMENT

In the book, Bannon claimed that there is "zero" chance that then-candidate Trump was not informed about his son's meeting with a Russian lawyer who promised "dirt" on Democratic presidential nominee Hillary Clinton Hillary Diane Rodham ClintonHillicon Valley: FBI chief says Russia is trying to interfere in election to undermine Biden | Treasury Dept. sanctions Iranian government-backed hackers The Hill's Campaign Report: Arizona shifts towards Biden | Biden prepares for drive-in town hall | New Biden ad targets Latino voters FBI chief says Russia is trying to interfere in election to undermine Biden MORE.

“Even if you thought that this was not treasonous, or unpatriotic, or bad shit, and I happen to think it’s all of that, you should have called the FBI immediately," Bannon said in the book.