Something to remember is that when Warren was with Minnesota there was talk of the Vikings leaving Minneapolis (possibly for LA of all places) when they were working to secure their new stadium in early 2012. Evidently the approval vote for the city to help in the cost and stay in Minneapolis occurred on the 11th hour.
https://www.cbsnews.com/news/vikings-clear-final-hurdle-to-get-new-stadium/#:~:text=The House passed it overnight,the best for this state."
I also saw a recent social media post that said McCaskey was getting a bit irritated with the process taking longer than it should be for this to be finalized. And that Warren was mentioned as reason for his ire. Although some of the corroborating stories appear to originate from back in December.