Bob Woodward is one of the world's most famous journalists.
As well as being the man who broke the Watergate scandal, he is also the author of Fear, an inside look at Donald Trump's presidency.
He will be discussing this topic at Dublin's Olympia Theatre on 10 June.
Speaking on The Last Word, Woodward assessed the last two years as "a high-risk series of moments for the whole country".
He feels it's "literally impossible to predict" whether Joe Biden, who has just launched his own presidential campaign, or any other Democratic candidate can defeat Trump in 2020.
"Trump is clearly vulnerable, but in 2016 people didn't think he could win."
Although Woodward feels that media coverage of Trump has sometimes been overly emotional, he believes it has done a good job for the most part.
"I think the job is to maintain the aggressive edge, and by and large, reporters have done this."
"We make mistakes sometimes and we just have to correct them, but I've done this for almost 50 years and the work of the major media in the country, which Trump calls 'fake news', is actually done in good faith."
He also discussed the Mueller report, and whether Trump could possibly be the new Richard Nixon.