evidence: Former presidential candidate Robert F. Kennedy Jr., who suspended his campaign on Friday and endorsed Republican nominee Donald Trump, has a long history of criticizing the man he now supports, including calling Trump a "threat to democracy," and, as recently as July, a "terrible president." [...] A Kennedy campaign spokesperson did not return CNN’s request for comment. [...] That’s in sharp contrast to how Kennedy has talked about Trump in the past, including accusing him of discrediting American democracy and saying that his late father, former US Senator and Attorney General Robert F. Kennedy, would have disapproved of Trump.