In fairness, if Dems wanted a majority black district there is not much else they could have done?
2010 redistricting in Missouri actually had a D governor and they had just above 1/3 th emajority in the state house.. The deal was to keep Cleaver and Clay safe from primary challenges but kick out Russ Carnahan and they bribed black delegates to do this as Cleaver and Clay are both black.
So MO 2nd was made a bit safer than in a more fair map and it would have flipped in 2018 without Cleaver and Clay's backstabbing. I don't think a 3rd D district was really possible but I think it would have flipped in 2018 with a more fairly drawn map.
Good on Air Claire for calling them out.
Here's the MO 2nd drawn fairly with 2010 numbers
Blue is 51% black VRA while green is the suburban district that is Trump +6 compared to the current Trump +11, this district was lost by 3 points in 2018 so this new district flips in 2018 by a point or two.(the district goes to St Charles county which is north instead of the more compact Jefferson county because st Charles belongs with the well educated white suburbs of st louis compared to the more WWC Jefferson county which has zoomed super hard right although people didn't know this in 2010.
Here is the district with Jefferson county
This moves it to Trump +10 although Kander won both variations of the green district by 2 points. I guess this variation might have allowed Carnahan to survive in 2012 although he goes down in 2014, not sure if this flips back to D in 2018.