Key bit:
"As a result, when journalists seek the fire behind the smoke in the Biden-Ukraine tale, they often call to ask my opinion. Many are eager to flesh out what seems a satisfyingly simple conspiracy, but I have to tell them: It isn’t true. The timeline doesn’t work. The investigation into Burisma, Hunter Biden’s employer, had ground to a halt long before the prosecutor was sacked. A subsequent probe into the company’s owner was opened because of a request from Ukrainian legislators, not because of prosecutorial initiative. There is, in short, no there there; the bloggers are putting two and two together — and coming up with 22."
If you don't know this guy, he is a big investigative journalist who specializes in corruption. You know, the kind of thing that Biden is accused of.
Link: https://www.washingtonpost.com/opinions/2019/05/08/why-joe-bidens-alleged-ukraine-conspiracy-doesnt-hold-up/