Former MMA fighter Chael Sonnen said he believes that ex-WWE CEO Vince McMahon ran former US President Donald Trump's presidential campaign in 2016. "Vince was the greatest influencer...Trump's campaign was exactly the way Vince promotes WrestleMania...It was like walk out music," he added. "Vince's number one thing is, 'Yes, it is business and entertainment but it is psychology'," he stated.