Bill Ackman, the billionaire founder of Pershing Square Capital Management, admitted in January that while registered to vote in the Democratic primary, he was "no longer a Democrat." At the time, he had sunk donations into the ill-fated Republican campaigns of former New Jersey Gov. Chris Christie, former South Carolina Gov. Nikki Haley, and Vivek Ramaswamy and had also financed Robert F. Kennedy Jr.'s campaign.
While Ackman indicated in subsequent months that he might support Trump, the first presidential debate Thursday night evidently sealed the deal.
Trump "is going to win in a landslide," Ackman wrote hours after the debate, which he said was an "indictment of the Democratic Party."
"The country should rally around Trump and help him succeed," added Ackman.
