I'm romping through the perfumed gardens of Eros
At this point it does not.
Could it, yes.
It depends on what Flynn knows and about who.
What he will be telling people.
Nobody really can answer this on here.
There are assumptions and leaks, nobody really know what Flynn knows.
Flynn was in the same meeting with Jared Kushner and Little Trump when they met the Russian lawyer, who said she had dirt on Hillary Clinton, which turned out to be her hacked emails. Flynn therefore knew what went on in that meeting. What was said by both sides. Little Trump and Kushner will be asked (or has been asked) about the meeting by the FBI. Flynn can therefore tell the FBI whether Kushner and Little Trump lied to the FBI or not about that meeting. The FBI can then charge Kushner and Little Trump with lying to the FBI, which is a felony. That means if convicted Little Trump and Kushner may have their butts violated in prison. That means Trump will have the choice of either resigning or watch his son and son in law become the girlfriends of prisoners inside a prison. Even a sociopath like Trump would not want to see that. It means the days of the Trump presidency is numbered.
Of course there is a chance that Kushner and Little Trump will try to save their own butts (literally) and tell the truth about Trump's collusion with Russia. If that is the case, Trump will also have to resign or face criminal charges and impeachment.
That remains to be seen. Not well, though.
The Blamestream is trying to scare people. Thecwell-informed aren't falling for it.
Proves that Trump obstructed justice. For a long time, Trump knew that Flynn lied to the FBI, but never said anything.
It doesn't impact it at all.
Embolden Trump to defeat the deep state.