Hahahahahaha
You Trumpies are a load of laughs when you ape your messiah.
Anyway, lying to the FBI is a crime. It was likely not legal for him to make the call in the first place which is why he lied about it. He lied because he needed to protect himself and Trump. Obama had placed sanctions on Russia, kick out their ambassador, and seized the Russian compound. Flynn trying to directly negotiate with them on that action, at Trump's orders, while neither were a member of our govt is not legal either. It's just like when Nixon committed treason with the North Vietnamese by telling them if they held off he would give them a better deal than Johnson while Johnson was POTUS.