LOL, this is super safe R.
Biden approval: 43/53 (-10)
Parson approval: 50/38 (+12)
Safe R for now, but there
might be a path if Greitens wins the primary
and Kander enters upon Greitens picking up steam. The Republicans would still be heavily favoured and Greitens is unlikely to win the primary to begin with, but the only primary poll suggests he could be a viable challenger (December 2019, Blunt 43-Greitens 32).
It's definitely a primary to watch. The NRSC will want to avoid another Senator as rebellious as Hawley.