Now we have some Bernie Sanders numbers:
PPP also tested a hypothetical that I have only seen tested by one other pollster this year. This is a 3-way race between Bush, Clinton and Trump as a third party candidate. While this is a very unlikely scenario, you really can't completely rule out that Donald Trump might try this either out of spite or out of thinking that he is the only candidate Conservative enough. I included the other 3-way poll to be done for comparison.