None. It is the classic political strategy that has been used by the progressive left for decades. The race card, or the use of the word "racist", is the modern day scarlet letter. If you support following current immigration laws, support protecting the US borders, or support defending and promoting United States sovereignty and rights afforded to legal US citizens by the Constitution, then in the eyes of the left you are a racist. They don't believe that the US is any better than any other country and they believe that the sovereignty of the international community takes precedence over the rights of US citizens granted by the US Constitution. They label someone "racist" in an attempt to shame them away from holding or promoting a certain position that they disagree with, but one that they cannot successfully argue in the court of public opinion using traditional intellectual methods. So in other words, it's the progressive left basically saying "if I can't win within the rules, I'm just going to take the ball home and stop playing". Pretty childish and intellectually dishonest but has been a very successful method in the past. The problem is that it's not working with Trump and it has the left all up in a tissy. Trump really does not care what you call him and he is calling the left's bluff. In fact it is even back firing on the left. Every time they try to pigeon hole him into being a racist, bigot, or what not, he actually jumps up in the polls. This is because the American people see this scarlet letter strategy for what it is, and they are no longer scared of it. This is the left's worst nightmare coming true.