The hole in the dike is now a breach as more extensive contacts between the Trump campaign and Moscow. Trump was informed of the Flynn concerns early on but did not take any action and appointed Flynn as his NSA. Trump is in a tight fix. If he tries to muzzle the spooks he'll only spur more damaging leaks. Who knows? A copy of his tax returns could show up in the NYT mailroom.
https://mobile.nytimes.com/2017/02/14/us/politics/russia-intelligence-communications-trump.html
https://mobile.nytimes.com/2017/02/14/us/politics/russia-intelligence-communications-trump.html