The Ukrainians publicly announced an investigation - not quite the one the Trump team was pushing for.

— Sam Vinograd (@sam_vinograd) January 16, 2020

DS agents do their jobs: they identify and investigate threats, often in partnership with foreign partners ( like Ukraine).

— Sam Vinograd (@sam_vinograd) January 16, 2020

We have legal/ law enforcement partnerships w the Ukrainian Ministry of the Interior - if Barr and Pompeo care about the security of our diplomats they’ll be fully cooperating with the Ukrainian requests for evidence and investigatory support right?

— Sam Vinograd (@sam_vinograd) January 16, 2020