I was never much in favor of anti-trust laws, anyway - the marketplace is a better regulator of business than the government - but when applied to businesses that have nothing or not much to do with communication, they are not unconstitutional. In the case of media, any attempt to regulate - whether its content, its corporate structure, any aspect of media - is a blatant violation of the First Amendment, and its provision that "Congress shall make no law ... abridging the freedom of speech, or of the press."
And even when well-intended, such anti-trust laws are unnecessary when applied to media. As I argued in my 1998 article in The Industry Standard - "Leave Poor Microsoft Alone" (not my title) - all the handwringing over Microsoft dominating the personal computing industry back then was not needed, and ignorant of media evolution. As I point out in my Human Replay: A Theory of the Evolution of Media, history has shown that we humans bend media to what we want as consumers, not what corporations may try to dictate. And sure enough, as the hue-and-cry against Microsoft in the late 1990s was reaching a crescendo, Apple was already on the way to staging a comeback with their rehire of Steve Jobs - a comeback which reversed the dominance of Microsoft, and left Apple in the powerful position it still has today.
The bottom line of all this is the Founding Fathers were right in what they put in the First Amendment. For democracy to function well, government should have zero control of media - zero, whether Trump, Clinton, Obama, anyone in between. (Which, by the way, is why I'm also no fan of so-called net neutrality.)