The past few weeks have been a firestorm of revelations concerning the DNI whistleblower and Ukraine-Donald Trump-Joe and Hunter Biden stories.
talkingpointsmemo.com
Hunter Biden joins the board after the Maidan revolution, in 2014. The events that are being investigated happened before 2014, under Yanukovitch. While Hunter is on the board, the Ukrainian prosecutor general shelves the investigation on Burisma during Yanukovitch's term, which angers the US and the rest of the international community. Christine Lagarde threatens to withhold funds, and so does Biden (the 1 billion dollars comment) UNLESS they continue investigating BURISMA.
Bad optics to have Hunter on the board when Daddy is VP of the US? Yes.
Now, how would the Bidens benefit from an investigation into Burisma?