Only the top ten candidates for the Republican Party nomination for President will make the debate. The first will be on Fox, the second on CNN. There have been complaints about those other seven candidates [there are a total of 17] who will not have a chance to debate with the others.
From time to time people who are alarmed about extreme right-wing politicians or actions, will give it/them the Nazi label. That is extreme. It may be over-reaction. It usually gives evidence of a lack of knowledge of American history or the various facets of American free enterprise. But there may be truth in it.
Are you sick of Donald Trump? Somewhat secretly many Americans think he speaks gutsy truth. Far too many Americans give Trump credit and a badge of authenticity because he is rich and greedy. From the beginning of our nation, Americans have represented this way of thinking and we try to hide it. We have given license to bigots, greed merchants, fascists, Nazis, etc. sometimes simply because they have wealth.