This is very bad news for Trump.
1. Others on the transition team *besides* Flynn had contact with the Russians.
2. One of (possibly many) topics Flynn discussed with Mueller over 19 meetings was those contacts.
3. Those contacts are now part of an ongoing criminal investigation.
No surprise there—I've long said that he (along with Trump, Bannon, Prince, Trump Jr., and one or two others) is likely a top-level target in the Mueller investigation.
Jared did some very bad things.