He wasn't able to defeat Cruz who has become quite unpopular after 2016, s sure as hell he ain't beating Cornyn.
He needs to carefully pick what he is doing next. If he loses another time, it is gonna be hard for him to be taken seriously.
The Cruz thing is a bit of a red herring since Cruz had a pretty good chance of winning the Presidency if not for Trump. So as hated as some think he is, the results on the GOP side in 2016 don’t bear that out. If not for Trump he would’ve at a minimum pushed Hillary to the finish line, if not actually won. Therefore pushing Cruz to within a couple of points in red Texas is a pretty good result and certainly worthy of a political future at a national level.