Darby has represented San Angelo and eight surrounding West Texas counties in the Texas House since 2007, and in 2025 he cast the deciding vote to move Texas's private-school voucher program forward even after calling himself "deeply skeptical" of it.
He carries an "A" rating from the NRA and backed the state's near-total abortion ban, including the six-week ban and the trigger law that took effect after Roe was overturned.
Darby’s take on Texas values
Darby voted for the 2021 law that banned drive-thru and overnight early voting and added new ID requirements for mail ballots — one of 80 House members who passed it over objections that it makes voting harder. [Texas Legislature record vote #118; 8/31/2021; LegiScan]