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CHARLES ASHBY/The Daily Sentinel

GOP Sens. Bob Rankin, right, and Owen Hill talk about bills before the Colorado Senate in this 2019 file photo.

State Sen. Bob Rankin is resigning his seat in the Colorado Senate.

The longtime legislator hasn’t said why he is leaving, only that he is doing so effective Jan. 10, one day after the start of the 2023 session of the Colorado Legislature.

Rankin becomes a state senator

Rep. Bob Rankin