For what it's worth, it is Rasmussen.
And it does contradict the past 3 polls that show Grimes ahead.
I see only two recent polls to show Grimes ahead, one of which was an internal. On the other hand, Fox and YouGov have both shown McConnell with comparable leads, which suggests that either SUSA was an outlier or that this race needs better pollsters.
I don't trust a word Fox says. YouGov is an Internet poll, so I don't know how accurate it is.
What about the SUSA poll that had Grimes ahead?
I mentioned the SUSA poll, saying that it is either an outlier, or that better polls than Rasmussen, Fox News, and YouGov are needed to check SUSA's work. Either is a fair assessment, but to claim based on one poll that Grimes has a lead is shortsighted.