I have had certain discussions with him in the past and where I've told him that I thought some of the rhetoric was problematic.

Mark Zuckerberg, commenting on a call he had with President Trump after he suggested thatvoters should vote twice to test the system. Facebook has since imposed new election security measures that include removing false claims about voting and freezing new political ads a week before the election. (Business Insider — September 4, 2020)