Stephen Miller is an advisor to Trump and is probably a psychopath. I don't use that label lightly either.
When a normal person gets genuinely angry, their facial expressions and body language convey the anger too. It's a natural reaction humans have when experiencing emotions and it's tough to hide or fake.
Stephen Miller raises his voice, he uses an indignant tone, he makes aggressive motions with his body, but his face shows no change in expression at all. It's not just this clip either, he's like this all the time. He's generally good at lying and changing topics during normal interviews, but he was cornered here and fell back to "pretend to be angry and change the topic." Clearly this reporter was having none of it.
The vast majority of elected Republicans are opportunists willing to use any opportunity to advance their narrative even if it's clearly blatant lies or bullshit.
Vance pushes the "eating pets" crap to anyone who will listen, and when he gets hard enough pushback from someone and can't bullshit his way out of it, he falls back to the "okay, maybe it's not true, but it represents real concerns people have so it's valid for me to talk about it."
Which is exactly what happened with the election results in 2020. They pushed the stolen election crap until it was pretty much irrefutably disproven, then went around saying they had to make it harder to vote because their voters, for some strange reason, thought the election wasn't fair.
DeWine is one of the very few Republican politicians left that has any sense of principle and isn't a cynical opportunist, even if most of those principles are pretty shitty.