Donald Trump just tweeted:
Don King, and so many other African Americans who know me well and endorsed me, would not have done so if they thought I was a racist!
— Donald J. Trump (@realDonaldTrump) June 11, 2016
Well, according to Wikipedia (the Simple English version – I know Dumb Donald have trouble with long words):
Racism is the belief that some races are better than others, and the actions which result from those beliefs
Donald Trump have offended just about every single race except White Americans – in public, so there are two possibilities here. Either he is a racist (in which case the above tweet is a lie) or he doesn’t mean what he is saying and writing in public – in other words – he lies. So either way – Donald Trump is a liar – Q.E.D.