Okay, I have to ask because it comes up a lot from the right: there's a lot of accusations that Clinton deleted some 30000-odd emails after that whole crap started popping up. Is that substantiated by anything or no? If yes, then why the hell did the FBI not take that into consideration in that big 'ol shpeel they published on the thing? Actually, on thinking about it, I think they did mention a bunch of deleted emails, which they managed to recover one way or another. So why the hell is this still a thing?
Basically, the FBI noticed that Hilary had been illegally using a private email server so they demanded that she turn over the server to them immediately so they could analyze it to determine if any confidential files had been compromised. Hilary basically refused, and did nothing for several months, while making no comment to the press or anyone else. Then one day she finally speaks up to say they she is fully cooperating with the FBI and turning over her email servers. Oh, except for the 30,000ish emails that were deleted and the hard drives scrubbed so that the data would be unrecoverable, and also several hard drives that somehow got physically destroyed with a hammer, all of which occurred after the FBI made their demands. But yeah, she's fully cooperating.
So, the FBI launch an investigation, which concludes with the head of the FBI making a nice little speech to the press. During this speech he explains that what Hilary did was technically a violation of the law, and that anybody else who had done the same things would have been convicted and punished to the full extent of the law. Also, if they find anyone else doing the same things in the present or the future, those people definitely will also be convicted and punished. However, in this particular case, he was unable to imagine how Hilary could possibly have had illicit motives when she was knowingly committing those extremely illegal actions and putting national security at risk, therefore he is recommending not to press charges against her. And just like that the whole thing was swept under the rug.
So why is this still a thing? Because even someone who's blind could see that Crooked Hilary clearly bribed or blackmailed someone to make this whole thing go away. There is absolutely no rational explanation for the FBI to come to the conclusion that they did.