Then there probably wasn’t a May poll.
There was, but the sampling period and sample size were not in the release. 538 only adds polls for which the sampling dates are supplied.
No, I just don’t buy that they polled this race in May.
So you think they're actually faking their numbers, or that they polled slightly earlier but had those numbers ready for a private release in May? The former prospect is quite a bold claim to entertain.
Actually, the former is what I meant, but the latter is possible given they polled MN-02 as well. I just don’t see why it would get better for Trump.