To be clear (not that I agree with this situation): Fox News (where that presenter works) is a cable network, beholden to the cable providers but not a broadcaster. The FCC has relatively little leverage to regulate it, because it does not rely on broadcast licenses.

ABC is a broadcast network. It relies on a network of affiliates (largely owned by a few big companies) who selectively broadcast its programming both over the airwaves and to cable providers. Those affiliates have individual licenses for their radio broadcasting bandwidth which the FCC does have leverage over (and whose content the FCC has a long history of regulating, but not usually directly over politics, e.g. public interest requirements, profanity, and obscenity laws).

Let’s not pretend that the Trump admin would’ve done anything about it even if they did have leverage. They actively encourage and participate in violent rhetoric when it’s directed towards their perceived enemies. Which includes the homeless.