Former President Obama reportedly repeatedly launched verbal attacks against Trump during calls with foundation donors calling him a “f–ing lunatic” and a “corrupt motherf–er” according to a new book. Edward-Isaac Dovere a staff writer for The Atlantic and former Chief Washington Correspondent for Politico says in his book “Battle for the Soul” that Obama would bash Trump repeatedly during the 2016 primaries but it was after Trump was in the White House that the barrage of name-calling and insults really picked up.

According to Fox News:

During the Republican primaries in 2016, Obama privately said he would prefer a Trump presidency over Sen. Ted Cruz, R-Texas, according to “Battle for the Soul,” written by Edward-Isaac Dovere. Dovere is a staff writer for The Atlantic and former Chief Washington Correspondent for Politico.

Dovere writes that Obama remarked that Cruz was smart and would know how to make change in Washington, D.C., where he believed a Trump presidency would just be a “mess.”

Obama would often dunk on his successor in calls with donors for his foundations who were eager to hear it. “He’s a madman,” Obama would sometimes say, according to the book. “I didn’t think it would be this bad,” he might offer. “I didn’t think we’d have a racist, sexist pig.”

“That f—ing lunatic,” he was also known to say, according to the book.

Obama notably avoided using Trump’s name while the cameras were on but it’s clear that his carefully crafted stately demeanor was gone as soon as he was out of the public eye.