My son is half Persian. Being half Scottish didn't make him white enough. He was still threatened that Trump was going to send him and his dad to the gas chamber.
Trump employs sycophantic Latin and Black people. He even has Mexican immigrants working at his golf clubs. That doesn't negate his blatant racism and bigotry.
It's a defining aspect of him and his MAGAs. As they're moving to appeal to right-leaning viewers, CNN could comfortably make the calculation that such viewership wouldn't be averse to them replacing the not white enough guy for two very white anchors.