he's mad because he's from texas and his district borders with a mexico but he doesn't understand it borders with new mexico
Well I think he is a "serious" Republican in that he actually sees an opening for a win on a red meat issue, and the former president is basically forcing the GOP to miss a lay-up win for their base.
Essentially Biden has presented them with a compromise that literally costs the GOP nothing (foreign policy support on Ukraine and Israel, which 3/4ths of them support anyway), and for that they get a comprehensive border security bill with a lot of harsh measures they want. And they can't take the free win because of Trump. Shit is hilarious.