Special Counsel Robert Mueller is tasked with investigating all these issues. 
It will be interesting to see where his investigation takes him on this.
He clearly has a duty to determine the veracity of the allegations in this article, and purposely failing to do so would itself be a type of obstruction of justice.
Look up Obstruction of Justice by Malfeasance on Google... quite interesting.
When investigators and prosecutors purposely investigate someone for ulterior motives, e.g. to cast aspersions on someone for political purposes, to cover up the real perpetrator in a crime, etc.