The plus 7 was poll was over a month ago. Weird now that the primary are settled, recent Senate polls are few and far between.
I tend to agree that the polling is very random, just not existing much since early June.
I think some private polls exist and they are worrying the Democrats on the close nature of races. If you see a case where five Senate seats will flip to the GOP in November...it’ll be a lock-down on the nature of the Trump enthusiasm. If they see 35-percent of blacks move over to Trump GOP candidates....they will be a shock.