This should be in Gubernatorial elections topic for whoever moderates these boards.
Well, it does have some relevance to Congressional elections. A number of people were lining up to run since it was assumed that Hutchinson would run for Gov. I don't know if they'd have much of a chance but some candidates might still jump into the Senate race.
Based on my knowledge of Texas, I'll say this:
No Republican will jump in the race to run against Hutchinson, because they know they'll lose. The Democrats will put up a token candidate in opposition, because they know they'll lose as well. Heck, they might not even put up a candidate with the way the Democrat party is being run in Texas. The race is already as competitive as it's ever going to be.