"They're not really a friend", despite the $1.3 billion a year in aid the United States gave them, President Trump said.
Woodward, a veteran journalist most well-known for reporting on the Nixon-era Watergate scandal, has only issued a brief statement in response: "I stand by my reporting".
The 75-year-old Woodward said that at a National Security Council meeting a year into Trump's presidency, when he was complaining about the cost of posting thousands of US troops in foreign countries, Secretary of Defense Jim Mattis had to explain the rationale to him.
Showing a "lack of basic understanding" about how federal debt works, Trump suggested that they should "just go borrow a lot of money, hold it, and then sell it to make money".
Among other things Colbert and Woodward discussed was if the author ever thinks about the motives of his sources.
"I think there are people in there that he can trust, it's just - it's a much smaller group than I would like it to be", Trump Jr., 40, said on ABC's "Good Morning America."
"This is very low-level person who will throw their name on an op-ed, and basically subvert the vote of the American people who elected my father to do this job", Trump Jr. said, calling the column "pretty disgusting" and "sad". According to Woodward, Trump made this comment during a Situation Room meeting in the White House on July 19 previous year, almost three weeks after he had a very successful meeting with Modi at the White House on June 26.
The host then pointed out that Wolff's and Woodward's books are entirely different and need to responded in a different manner because the latter has written more than half a dozen books on the past presidencies.
"The Woodward book is a scam", Trump tweeted on Friday.
He described the current and former Trump officials who talked to him as "people of conscience, people of courage who said, 'Look, the world needs to know this'". He added: "I would have been happy to correct them if Mr".
"I don't know who it is", Woodward says.
"We're underestimating how serious all of this is", Woodward tells NPR.
"They realized that [these documents] would endanger the country", Woodward said. All these anonymous sources with their knives out, and nothing about Russian Federation collusion, or obstruction, or anything else...
Pressed on whether Trump can win a credibility battle with the Pulitzer victor who helped expose President Richard Nixon's Watergate-era transgressions, Sanders pointed to "actual, on record" accounts from White House staffers, again pointing to Mattis and Kelly, "not disgruntled former employees".