Few people have had more impact on U.S. politics in the past five years than Stephen Bannon. The Conservative firebrand helped build Breitbart News into a media juggernaut and was indispensable in getting Donald Trump elected President.

Bannon is a notorious workhorse who doesn’t hold back when it comes to snowflakes and RINOs. In a new book by Bloomberg’s Josh Green, Bannon reportedly unleashed an epic tirade against Paul Ryan after he caught wind of a plot to install the Speaker as the 2016 presidential nominee.

Yahoo News via Independent UK reports:

According to Mr Green, Mr Bannon flew off the handle when he learned of a Republican plot to install Mr Ryan as the presidential nominee at the 2016 Republican National Convention. At the headquarters of his far-right publication, Breitbart News, Mr Bannon unloaded on Mr Ryan as a “limp-d**k motherf***** who was born in a petri dish at the Heritage Foundation,” a conservative think tank. TRENDING: Black Lives Matter Activist Wearing 'Justice for Breonna Taylor' Shirt Walked into a Louisville Bar and Murdered Three People In Devil’s Bargain: Steve Bannon, Donald Trump, and the Storming of the Presidency, Mr Green argues that the Speaker exemplified just the kind of traditional conservative politics Mr Bannon hoped to upset. A strong supporter of the emerging “alt-right,” Mr Bannon threatened to rally their young, far-right forces against Mr Ryan. “Pepe’s gonna stomp their ass,” he reportedly said, referring to the movement’s cartoon frog mascot. Mr Bannon cemented his dislike for Mr Ryan in his role as chairman of Breitbart News, which frequently went after the Speaker during the presidential campaign.

Bannon’s deep distrust towards Speaker Ryan is certainly merited. Breitbart News’ Matthew Boyle published a report in March including leaked audio of Ryan telling fellow Republicans that he won’t ever defend Trump after the Access Hollywood tapes dropped.

Breitbart News reported: