THE GOOD GUY IS GONNA WIN.
13 seems a little high, but now that Peters is routinely posting wins between high-single digits and low-double digits, we can pretty much assume that this is over.
How can Peters be doing better than Booker in a much less urban and Democratic state than New Jersey?
Peters has run a nearly flawless campaign, whereas Terri Lynn Land's campaign can't stop making errors. Peters has played offense, while not coming off as overly aggressive, or anywhere near desperate (i.e. attack ads for the sake of seeing what sticks to the wall). Land's campaign sputtered at the Mackinac Conference, and she never really got going.
I'm not privy to how Booker's campaign has been run. Peters was able to beat an eight-term incumbent in what was a slightly GOP-leaning district, so he was used to running an actual campaign in a competitive environment--something Terri Lynn Land never had to do, and something that the Michigan GOP hasn't done for a Senate race in a very long time.