HBO host Bill MaherWilliam (Bill) MaherKrystal Ball tears into 'Never Trump' Republicans Media and candidates should be ashamed that they don't talk about obesity Bill Maher, Michael Moore spar over Democrats' strategy for 2020 MORE said Friday that he is “glad” billionaire conservative activist David Koch is dead, adding, that he hopes “the end was painful.”

“Yesterday, David Koch, of the zillionaire Koch brothers, died of prostate cancer. I guess I’m going to have to reevaluate my low opinion of prostate cancer,” Maher said, drawing laughter during his show, “Real Time.” “He was 79, but his family says they wish he could live longer, but at least he lived long enough to see the Amazon catch fire.”

"Condolences poured in from all the politicians he owned, and mourners have been asked in lieu of flowers to just leave their car engines running," he said, pausing to applause. "As for his remains, he’s been asked to be cremated and have his ashes blown into a child’s lungs," Maher quipped.

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Koch, who, along with his older brother, was a formidable conservative activist and donor, died Friday morning at age 79 after being diagnosed with prostate cancer more than two decades ago.

“He and his brother have done more than anybody to fund climate science deniers for decades, so f--- him. The Amazon is burning up. I’m glad he’s dead, and I hope the end was painful,” Maher said.

The Koches are best known for their polarizing influence over American politics. They have been known largely for their massive political contributions to Republican candidates and libertarian-leaning causes. Koch and his brother Charles poured millions into organizations and causes to stop mobilization around climate change and environmental research and legislation as well as public transit initiatives.

The Koch network has lent a hand to many Washington figures, including to Vice President Pence, Secretary of State Mike PompeoMichael (Mike) Richard PompeoClarence Thomas, Joe Manchin, Rudy Giuliani among guests at second state visit under Trump Senate Judiciary Committee requests consultation with admin on refugee admissions State Department's top arms control official leaving MORE and Sen. Joni ErnstJoni Kay ErnstTrump judicial picks face rare GOP opposition 'Mike Pounce' trends on Twitter after Trump slip at GOP retreat Overnight Energy: Trump administration to repeal waterway protections| House votes to block drilling in Arctic refuge| Administration takes key step to open Alaskan refuge to drilling by end of year MORE (R-Iowa). In the 2016 election cycle alone, it spent nearly $900 million, almost matching what the entire Republican Party spent on candidates that year, according to The Washington Post.