Bill Ackman is known for going all-in on his investments, and he's putting it all on Michael Bloomberg.
Ackman likely won't be putting any actual money on this bet—Bloomberg sure doesn't need it—but he's certain the former New York City mayor and head of his eponymous company is going to run for U.S. president, and win.
"I would do everything in my power to get this guy elected," Ackman, the head of Pershing Square Capital, said at the Bloomberg Markets Most Influential Summit.
Bloomberg has been mentioned on multiple occasions as a potential late-comer to the race. Though he's politically independent, some suspect he would take a shot at Democratic front-runner Hillary Clinton.
"The window is now or never," Ackman said. "Bloomberg is going to run and is going to win president."
In other remarks at the conference, Ackman said Valeant is not the money-hungry pharma giant preying on sick people that its detractors make it out to be.