If you want my opinion Ted Cruz is appearing to help Trump as a way to pave his path to 2024 nomination. He is still on a lot of people 'never' list after he used his 2016 convention speech to urge the GOP to refuse to nominate Trump. There is no question that will be raised as that campaign proceeds. He needs to distance himself from it. So offering to argue a case he probably expected wouldn't even make it to the court was a good way to wave his arms, shout 'look at me! I'm a Trump guy! Forget about that convention stuff!'
I like Ted Cruz but he's a politician with aspirations to rise. His actions need to be evaluated through that lens.
Am I missing something...is there another type of politician!!! Trump has praised Ted Cruz in the past.