Missouri polls were terrible last year and I have faith that they will continue to be terrible.
They might not be as bad in 2022. They were far more accurate in 2018 than in 2016 or 2020, and the state is now moving left (very, very slowly). If the polls match their polling to the 2020 electorate, they may well be polling an electorate to the right of the state. (This is why Georgia polls were accurate in 2020 - they underestimated how much the state had changed, so they polled an electorate to the right of the state, and with Trumpist turnout, almost every state "votes to the right of itself.")
The polls underestimated Hawley's win, but they did correctly have him winning for most of the race, especially the post-Kavanaugh portion of the race. They also got McCaskill's percentage (45.6%) exactly right. It seems to have just been the same "undecideds are closeted Republicans" phenomenon that we've seen all over the Midwest since 2016, so I imagine in 2022 that's the way to unskew polls.
