"Conspiracy against the United States" - Russia investigation
Motive may be greed or hatred for Hillary, but these Trump goons (or Trump himself) that are either under indictment or facing imminent indictments in the Russia investigation are likely to face many charges, but the "Conspiracy against the United States" charge that Manafort and Gates were slapped with, will be the one that will likely be easy to prove for the Muller team. Hidden meetings with Russians (including its ambassador), and conspiring to kidnap someone in the US to get paid by the Turkish government (in Flynn's case), and the issues they discussed or attempted to bring to fruition are indeed conspiracy against the United States and its laws.
Conspiracy to obstruct justice was committed the second the White House team and Trump gathered and bandied about ideas on the best way to fire FBI director Comey and how best to shut down the Russia investigation.