Obama didn’t do anything because the Russians didn’t do anything.
His name was Seth Rich.
The big question is why would russia want trump to win? There are so many scenarios that you could come up with to explain that notion, but far more that would contradict it.You could even go so far as to say they colluded with obama to hobble trump . (you have to be a fool to have believed hillary would win. You don’t win the presidency with a perpetual 52 percent- plus negative approval rating since the 90s)