Hillary, as usual, had all kinds of scandals which CNN wasn't covering yet they'd jump on Trump over every little thing. CNN gladly pushed a narrative about violent Trump supporters but when it was discovered that supporters of Hillary Clinton trained people on how to disrupt Trump rallies and incite violence, they didn't cover it. Think about it, Hillary's people created the violence and CNN comes in and blames it on Trump's supporters making it appear like they were a bunch of angry rednecks. This is just one example of why Trump went after them so the bottom line is CNN threw the first punches and Trump being a Brooklyn boy, punched back even harder.
But in my opinion there's more to why CNN has constantly gone after Trump after he won the election and that is they and other media were humiliated over their predictions of Hillary's landslide victory. Even the New York Times had a front-page article stating she had a 93% chance of winning. All anyone had to do was look at the faces of the news anchors at CNN and MSNBC, when the last of the election results came in and know how biased they were. Tears were even shed by some of their “professional” news anchors.
Either they had to accept that they were exposed for being liberally biased or they could take a different tact and push a new narrative that Trump stole the election. They’ve tried desperately to tie Trump to Russia but it’s being debunked including having Democrats just yesterday admitting their committees hadn't found any wrongdoings between Russia and Trump's campaign. CNN also spent countless hours talking about how Hillary won the popular vote which is of course blatantly biased. They were doing everything they could to try to save face when the best thing they could’ve done is just lay low and not pile on to their own mess.
I don't like Trump but I like the direction he's trying to take our country. I think it's highly likely that we will end up with a President Pence if Trump continues to speak his mind with no filter; but this doesn't matter when it comes to CNN's coverage. It's okay to have their segments with political celebrities/pundits which is what Fox News has with people like Hannity and Tucker, but Fox also has news anchors like Shepard Smith who I don't have a clue which party he's affiliated with and that's how it should be. They share way more news than the other networks without commentary.
CNN should either accept who they are which is a political arm for the Democrat Party, or they should change their format and see how their ratings do by becoming a legitimate news organization. With their ratings and profits going down over the last few years, I’d recommend they do something quickly.