But I guess a news site probably uses correct grammar...
If only that were true! Sadly, you will encounter poor English grammar and spelling quite frequently even in the most highly regarded print news media.
That said, this sentence is grammatical. You are right that normally the "place clause" would go after the main verb. But English word/clause order is flexible in some cases, and changing the order is usually done to emphasize some part or another of a sentence.
In news headlines and articles, this flexibility is very important and often exercised, because journalists know that many readers who are skimming the text will stop reading after a few words. It is therefore valuable to put the most important and eye-catching information as early in the sentence as possible. I would guess that in the opinion of this journalist (or editor), emphasizing "leaked emails" is more likely to grab a reader's attention and interest than "white nationalism." Whether this is true is a matter of opinion, but this is the kind of consideration a writer can take into account when choosing the order of a sentence.