I just read here (somewhere) last night, that one state (Nevada?) has a caucus filing date of October 15th.
I clearly recall the filing date, but I may be off on the other info. Someone found the filing date info on that state's elections commission website.
hmmm...I just read an article, as I couldn’t find anything on a Nevada official website, but it said that Iowa and Nevada were the same, as caucus states they don’t have any official deadline. The only hard deadline I have see so far are the ones already mentioned, South Carolina, etc. Still looks to me like the end of the month, that is, the end of October......