The difference is that when the establishment tries to take out Trump, it reinforces his message. Negative will not work against Trump, and that has been proven repeatedly. They would be better off treating him like an obscure footnote and talking about why their candidate is the best.
>> Negative will not work against Trump, and that has been proven repeatedly.
Be careful not to over-generalize.
Two kinds of negative against Trump have been proven ineffective:
1) Negative ad hominem and innuendo
2) Attacking the conservative aspects of his message (e.g. “Trump is a heartless bastard because he wants to deport illegals and stop Muslim immigration”.)
However, negative attacks against Trump’s self-documented liberal positions (pro-ethanol, pro-Kelo, cozy with the Clintons and other democrats, etc.) as well as his waffling and “flip flops” as he carefully but noticeably moves towards the left might bear LOTS of fruit.
They’d better get on it pretty soon though, or the window of opportunity will close.