Mueller characterized the numerous linkages and associations between the campaign and Russian contacts as collusion. Collusion, however, is not a federal crime. The actions Trump and his campaign engaged in ought to have been a crime and, someday it might be. But because colluding with “agents of influence,” which Trump’s campaign officials did, is not a crime, Mueller was left with trying to establish a conspiracy.
After reading that Mueller could not establish a conspiracy between Donald Trump and the Russian government, we find that he obstructed the investigation of a conspiracy. Laying out the obstruction facts first is not merely a matter of style; it is a part of the context for understanding why Mueller could not establish a Trump-Russian conspiracy. According to Muller the President discouraged witnesses from cooperating with him and offered pardons to those who refused to cooperate.
Many things reported in the media were outside the scope of Mueller’s investigation, such as Trump’s potential susceptibility to Russian influence because of his financial dealings. However, there is a note in the report suggesting that there are compromising tapes of Trump in Russia. The existence of compromising tapes are consistent with the description “golden showers” that appeared in the Steel Dossier.
But there is more than enough in the report to impeach Trump. Besides discouraging witnesses from testifying, Trump engaged in at least 10 other acts that could be obstruction of justice. Between loopholes in the law and obstructing justice, it is no wonder Mueller could not establish a Trump-Russian conspiracy.
https://www.nytimes.com/2019/04/18/us/politics/mueller-report-pdf-takeaways.html
https://www.nytimes.com/2019/04/23/us/politics/trump-mueller-obstruction.html