Paul Davis? If we’re counting primaries, then Jessica Cisneros.
But won't Henry Cuellar lose this time?
Cuellar's last victory was due to strong institutional support from establishment Democrats. If his institutional support remains strong enough, he can definitely win again.
Post-Dobbs, institutional support might be reluctant. The runoff was after the leaked decision, but it was before the case was formally decided. Cuellar only won by 200 votes with all that institutional support, too.
Tbf Cuellar votes more with the pro-choice side than the pro-life side by now anyway lol