There just isn’t much of a pattern in the data to back up the idea that Mueller’s support is declining across the board. Morning Consult found a 7-point increase in Mueller’s favorability rating and a 13-point increase in his unfavorability rating since last July, which puts his net approval rating (his approval rating minus his disapproval rating) at -4 now. But other pollsters who have tracked Mueller’s favorability over time1 don’t show consistent shifts. Fox News found Mueller with a +6 point positive rating this month — the same as they found in April. NBC News/Wall Street Journal found Mueller at +11 this month, +9 in March, +7 in December 2017 and +13 last summer. There’s no sign of a consistent trend between pollsters.