Billionaire Bill Ackman explained why he thinks “dictators feared Trump” during a testy discussion on CNBC over the former president’s ability to lead.

Ackman, best known for being an investor in Google and Chipotle, contended that this election cycle is one of the few times in the nation’s history where voters can do “an A-B comparison” between the two presidential administrations and said the United States was better off under former President Donald Trump’s leadership. During his argument, Squawk Box co-host Andrew Ross Sorkin interjected that Trump is constantly criticizing Google ahead of the election, asking Ackman how he felt about this given how he has purchased stocks of the company.