Mueller Report, page-66

The choice that faced the American people was more of the same with Hillary or a bet on Trump a choice I would not like to have had to make but I rather Trump than the Clinton's,their failing reach back to their dirty deals in Arkansas, Hillary's incompetence as Secretary of the US and the Clinton Foundation that is still under investigation.
When you legal judgements of this importance the legal profession always leave wiggle room or leave some doubt so they can sleep at night without being ridiculed if investigation in the future come up with a different findings,they was never going to be a completely clean sheet after the investigations but what is clear there was no collusion proved between Russia and Trump.