The Clinton campaign
There are a few problems with that:
1. The people who are voting for him don't care. "He's racist? Yes? And? I'm racist too. Why *wouldn't* I want to vote for him?"
2. People with memories longer than a gnat's remember the whole "superpredators" bullshit. Calling Trump a racist is a bit kettle/pot.
3. The Clintons haven't been exactly minority friendly except when it's politically expedient. LGBTQI rights? Only in the past few years.
"You can't shake the Devil's hand and say you're only kidding" TMBG "Your Racist Friend"
The only one really qualified to call out Trump on racism and "othering" was given the finger by the DNC.
Trump is a bigot. He wears it on his sleeve. Hillary's bigotry is more covert. Hillary is only marginally better, and that's not saying much.