It's one of the most important and surprising events of our time and much of the discussion is anti-rational, i.e. bad people support Trump so Trump is bad; many are claiming that electing Trump would be catastrophic and discussing potential catastrophes is supposed to be one of the purposes of LW.
I think Trump's rise is interesting for a number of issues that people here have particular interest in.
How he wins. How his attackers lose. The power of his signature issues in trade and immigration. The potential for a political realignment with the Republican Party, and how that realigns US politics as a whole.
The media has been outraged, they have attacked, and they have failed to bring him down. His poll numbers just go up and up and up. That's interesting, and merits discussion.
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
Notes for future OT posters:
1. Please add the 'open_thread' tag.
2. Check if there is an active Open Thread before posting a new one. (Immediately before; refresh the list-of-threadspage before posting.)
3. Open Threads should be posted in Discussion, and not Main.
4. Open Threads should start on Monday, and end on Sunday.