In the same way that there is no evidence that there wasn't. This is under actual intelligence agency investigation(s), and if there was nothing, then why all the obstruction? If there is nothing to hide, why not let the evidence, or there lack of, speak for itself. The president of the united states, during the campaign, publicly asked for Russian interference in the election. People on Trump team actually got on Twitter and said that they have been having contacts with Russian agents/hackers. Trumps NSA actually spoke with Russian government about lifting sanctions that were placed for definitely interfering with US elections, this is not guess work, this is proven. Not sure where you are getting your news, but it would seem that you are in a safe space bubble. Let me guess, infowars, brietbart, etc...