Anyone who has actually kept up with it and read the newspapers, KNOW there was collusion, whether it was intentional by the campaign or they were duped by the cunning Russians... or simply put, whether it was witting or unwitting, is something only Mueller and his team, knows.
The Trump Tower meeting was collusion.
Roger Stone working with Assange, an arm for the Russian govt to release their stolen goods, and coordinating with Assange on when the stolen emails would be released to strategically help the Trump campaign, is also collusion and is most certainly breaking the law, in several ways....