First, I can assure everyone that this whole investigation will not find evidence in Russia affecting the presidency election because both the establishment (Obama is one of them) in US government and their mainstream media are lying trying very hard to overthrow Trump.  
Also, US government is actually the real expert in intervening elections in other countries such as England, France and Middle East and that the US government has been intervening others for decades.  So what's wrong with Russia intervening US even if it is true?