In 2020, the Texas ballots didn’t have a straight-ticket device, the first time ever since the 1950’s. Removing the device effective 2020 seems to have helped increase the percentage of the vote for lower-ticket Libertarian candidates.
In 2018, in the U.S. House districts in which there was a Republican, a Democrat, and a Libertarian, the Libertarian U.S. House candidates polled 1.66% of the vote. In 2020, in Texas U.S. House districts with a Democrat, Republican, and Libertarian, the Libertarians polled 2.43%.
In statewide judicial partisan races with all three parties in the race, in 2020, the three Libertarians polled 2.52%, 2.34%, and 2.51%. In 2018, there was only one judicial race with three parties, and the Libertarian in that race polled 2.28%.