The is no question there was collusion with Russia in 2016, but not by Trump or his campaign. It was clearly with Hillary, Bill, Podesta and Obama. Can the case be proved with the simplest of investigation using information on the public record?? - you betcha!!!!
Yes and with the help of the DOJ, FBI, CIA and the Obama White House. Susan Rice even wrote that email admitting that there was some discussion of it all inside the Obama Oval Office!
So the evidence says it leads right to Obama. I don’t expect Obama will ever face anything for it, and I doubt he was the mastermind - I believe he was probably informed of some of it, and understood but didn’t need to get too involved they already had scores (literally scores) of people inside the DOJ and intelligence community doing Hillary’s bidding. Those people must face justice.