The April quarterly campaign finance reports are due at the Missouri Ethics Commission:

C091061: Scott Sifton For Missouri
Committee Type: Candidate
Po Box 4396
St Louis Mo 63123
Party Affiliation: Democrat
Established Date: 02/19/2009
[….]
Information Reported On: 2019 – April Quarterly Report
Beginning Money on Hand $317,989.66
Monetary Receipts + $37,221.68
Monetary Expenditures – $41,749.64
Contributions Made – $0.00
Other Disbursements – $350.23
Subtotal ($4,878.19)
Ending Money On Hand $313,111.47

[emphasis added]

Well, okay, that’s a lot of money for a state senator who is term limiting out.

And then there’s this:

C180701: Show Me Leadership Pac
Committee Type: Political Action
Po Box 29167
St Louis Mo 63126
Established Date: 11/17/2018
[….]
Information Reported On: 2019 – April Quarterly Report
Beginning Money on Hand $100.00
Monetary Receipts + $4,600.00
Monetary Expenditures – $0.00
Contributions Made – $0.00
Other Disbursements – $0.00
Subtotal $4,600.00
Ending Money On Hand $4,700.00

Only $4,700.00. Definitely not a republican PAC.