On Thursday, 18 April, the Mueller report was officially released to Congress. According to those who have seen it, the report does not clearly identify genuinely treasonable activity on Trump’s part. However, the Washington Post among other media outlets is saying that Mueller did not rule out the possibility that Trump did have some sort of relationship with Russian security services. Moreover, the report lays out a clear pattern of obstruction of justice by Trump and his minions.
Moreover, the Post has released the full, albeit redacted, report on its website. You can see the report here.