A crescendo of corruption 6 wks in by the Trump admin is succinctly laid out by Senator Cris Murphy. Check out the following video. It is long but gives a great overview, with a takeaway that the Congress needs to take action and foreign govts need to be wary.
https://www.youtube.com/watch?v=hycoCYenXls&list=WL&index=1&t=823s