The author of a new book on the Bush presidents revealed some of their true thoughts on Trump.An upcoming book shows that former President George H.W. Bush did not mince words when asked about President Donald Trump, back before Trump had won the election.

“I don’t like him,” Bush told historian Mark Updegrove in May 2016, according to The New York Times. “I don’t know much about him, but I know he’s a blowhard. And I’m not too excited about him being a leader.” Bush added that Trump appeared to be driven by “a certain ego.”

Updegrove’s book, “The Last Republicans,” deals with the relationship between the senior Bush and his son, former President George W. Bush. The title was inspired by a quote from the younger Bush, who told him during the 2016 election, “I’m worried that I will be the last Republican president.”

“And it wasn’t just about Hillary Clinton becoming president, as the Republican Party was having a difficult time finding itself,” Updegrove told CNN. “It was because Donald Trump represented everything that the Bushes abhorred.”

The elder Bush also said that he voted for Clinton in 2016, while his son said he voted for “none of the above” as president and Republican candidates on the rest of the ballot.