"And I'm not too excited about him being a leader", said George Bush Sr, who was president between 1989 and 1993. I don't know much about him, but I know he's a blowhard. And if you talk to those around him, they have confidence in his leadership.
His son, George W. Bush, didn't go as far as to vote for a Democrat but allegedly left the presidential ballot blank and now says Trump has no understanding of how to be president.
The new book, by author Mark K. Undegrove, consists mostly of interviews looking back at the Republican Party over the past few decades and explores the connection between the elder Bush and his son, former President George W. Bush.
"The Last Republicans" is set to be released on November 14.
Updegrove, the founding chief executive of the National Medal of Honor Museum and the former director of the Lyndon Baines Johnson Presidential Library and Museum, came up with the book's title after a comment from the younger Bush during the 2016 election season.
"I don't like him".
George H.W. Bush confirmed that he voted for Democratic nominee Hillary Clinton.
The White House released a statement Saturday about the Bush family comments, calling the war in Iraq "one of the greatest foreign policy mistakes in American history".
They told Updegrove they felt that trait was especially challenging, or even lacking, for Trump.
Indeed, at one point during the 2016 presidential campaign, the younger Bush confided to the author, "I'm anxious that I will be the last Republican president". "Interesting, won't last" was the reaction that George W. Bush had in those days, Updegrove writes.
Just last month, George W. Bush delivered a speech that seemed to call out so-called Trumpism - and the bigotry, conspiracy theories and "casual cruelty" associated with it.
Trump, who doesn't like them either and shares a complicated relationship with all the living former presidents, will have something to say about it soon enough, given how he prides in his ability to counter-punch. He added that Cheney and Donald H. Rumsfeld, his defense secretary, "didn't make one f-- decision". "I understand the way the system works", he said.