In November – Amendment 1, including redistricting reform – via the Missouri Secretary of State web site:

State of Missouri – General Election, November 06, 2018
Official Results
As announced by the Board of State Canvassers on November 30, 2018

Constitutional Amendment No. 1
3256 of 3256 Precincts Reported

YES 1,469,093 62.021%
NO 899,613 37.979%

Total Votes: 2,368,706

[emphasis added]

By 569,480 votes and 24.042 percentage points.

Uh, that’s a mandate.

Today:

KMBC @kmbc
Missouri governor wants repeal of new redistricting law [….]
3:13 PM – 23 Dec 2018

Why not? Ignore the will of the voters. It’s the republican way.

Not if CLEAN Missouri has voters to motivate over this (and they certainly do):

Sean Soendker Nicholson @ssnich
Amendment 1 passed in a landslide [checks notes] 47 days ago.

#moleg #mogov
[….]
11:22 AM – 23 Dec 2018

Welcome to Missouri.