Crockett is seeking the Senate seat held by Republican John Cornyn, who is running for reelection in the GOP-dominated state.

Republican officials in Oklahoma and Florida have also launched plans to expand the presence of the conservative youth organization founded by Charlie Kirk.

Democratic Rep. Jasmine Crockett launched a campaign Monday for the U.S. Senate in Texas, bringing a national profile to a race that may be critical to Democrats’ long-shot hopes of reclaiming a ...