Today "The Hill" had a interesting podcast on the Mueller Investigation about 5 different investigations that are taking place.
#1 Financial in that both Manafort and Gates have already been charged with financial and money laundering crimes and in all likelihood so has Trump & Kushner.
#2 Russian Hacking of Election the use of the social media through bots to send out the Russian propaganda aimed at creating discord during the election.
#3 The active cyber intrusions by the Russians with the hacking of the DNC and Podesta's e-mails. The weaponization of that information through Wiki Leaks.
#4 The Russian Campaign Contacts we know the players but it starts with the recruitment attempts by the saintly Carter Page back in 2013. Which now includes a list of indictments in Flynn & Papadopoulos and in other possible indictments including Kushner & Donald Junior. The Wall street Journal has identified at least 6 Russian officials that were actively involved plus the Dutch intelligence cyber infiltration of Cozy Bear.
#5 Charges also about Conspiracy against the USA part of Manafort indictment and Not registering as a Foreign Agent & Obstruction of Justice.
The podcast refers to Trump always putting out collusion which isn't a criminal charge in the USA but the charges above could be made to people in the administration or possibly Trump himself.
It is speculated that the investigation has done a excellent job in attaining information and part is that they are more than willing to have conversations with Trump.http://thehill.com/podcasts/hillcast/373370-listen-five-threads-of-the-mueller-investigation