It can only be that Flynn was told by Trump to make the call.

“Recall that in 1984 Senator Ted Kennedy approached the Soviet government about aid in defeating Ronald Reagan’s reelection. He offered them diplomatic and arms control concessions if they would help install Walter Mondale in the White House. Not surprisingly, Kennedy gets a pass if not a conspiratorial wink of assent from the guardians of democracy in the press. Naturally, they assume all partisans work with foreign governments to achieve their electoral aims.”
(snip)
Unanswered is this: What would be wrong with Flynn discussion sanctions with Kislyak? What law could he have broken? Over the weekend the know-nothing press, eager to pound General Flynn with any rhetorical weapon at hand, made breathless references to potential violations of the Logan Act—a 1799 law that prohibits American citizens from negotiating with foreign powers without authorization. No one has ever been convicted under the Act and Flynn most certainly did not violate it. But that wasn’t the point of the allegation and it’s not the point of the coordinated attack on Flynn. This is the politics of personal destruction as practiced by the Left since the Clinton ascendancy in 1992. It’s a scorch the earth, burn the huts and salt the fields strategy used to intimidate and silence adversaries: use an allegation or smear no matter how far-fetched or unfounded in order to gain a tactical advantage in the news cycle. Wash, rinse, repeat. And if you string together enough little wins maybe you get a major victory

The chairman of the House Intelligence Committee said Tuesday that the most significant question posed by the resignation of national security adviser Michael Flynn is why intelligence officials eavesdropped on his calls with the Russian ambassador and later leaked information on those calls to the press.

general flynn resigned because he had become a distraction

general flynn resigned because he had become a distraction

One of the central questions behind the Mike Flynn flap that should have been asked but largely wasn't is: who was wiretapping the general? The answer, we know now, was the National Security Agency, formerly known as No Such Agency, the nation's foremost signals-intelligence (SIGINT) collection department.