Michael Moore believes Donald Trump “is going down in flames” in this year’s presidential election, but is also warning Vice President Kamala Harris not to fumble her chances with her party’s left wing.

The progressive director was among the earliest big-name Democrats to call for President Joe Biden to drop out of the race over concerns about his cognitive decline, and continued Friday to champion Harris on his Substack as the right replacement to defeat Trump in November.

“if you know to really read the polls, or if you have access to the various private and internal polling being conducted by and shared only amongst the elites, Wall Street, and Members of Congress,” he wrote, “then you already know that this election was over weeks ago.”

Moore argued that “Trump’s momentum has come to a screeching halt” in recent months and that even Republicans have tired of his “nonstop drone of oral diarrhea” about Harris’ race, lies about Haitian migrants eating pets and rants about Hannibal Lecter.

But the filmmaker and antiwar activist has also been staunchly critical of ongoing U.S. military support for Israel amid the ongoing bombardment of Gaza. He slammed the Democratic National Convention earlier this summer for not inviting a single Palestinian speaker, said last month that Biden is being “played like a sucker” by Israeli Prime Minister Benjamin Netanyahu and has in his newsletter previously decried the U.S.′ “funding and arming the slaughter of children.”

Moore warned Friday that “traipsing around Wisconsin” with Liz Cheney isn’t doing Harris any favors with progressives — who could cost her the election.

“Another mistake that could be made in these final 4-5 weeks is if Harris is advised by her wealthy donors to shun the left and drop her more progressive positions in favor of a ‘move to the center,’” he wrote.

He went on to lay out several electoral scenarios in which Harris could win, so long as she can persuade habitual “nonvoters” to go to the polls.

“All we need is just a few thousand of them to show up — just this once — to make a difference: To cut taxes for all working people, to make the rich pay theirs, to keep the government off women’s bodies,” he wrote.

Despite his criticism of the Biden administration, Moore urged readers to back Harris and to help elect Democrats to the House and Senate in case Harris loses.

He concluded his post with a sobering reminder.

“If there ever was an election where the totally unexpected and crazy could happen, this is already that election,” he wrote. “Assume nothing. Take zero for granted. Work to prevent the worst results and prepare to make a possible Trump presidency a complete failure.”