I think the leaks were a last resort, so yes, go ahead and investigate, but understand they probably went through proper channels first.
Quick timeline as I understand it (from what we know now)
- Trump elected
– Sanctions put in place against Russia for involvement in election of Trump
– Flynn contacts ambassador to discuss sanctions
– Story comes out that Flynn had contact shortly after sanctions
– Flynn denies discussing sanctions
– Team Trump deny Flynn discussed sanctions
– Intelligence community tells Trump and AG that Flynn discussed sanctions
– Attorney General Yates tells Trump that Flynn discussed sanctions
– Attorney General Yates fired
– Intelligence community again insulted by Trump
– 2 weeks go by, no one releases the information that Flynn discussed sanctions with Russia
– someone leaks the information
– Flynn is let go and damage control begins
The appearance is that Trump had no intent of firing Flynn or letting the world know what he was told several weeks ago. The leak forced his hand, so he’s upset.
Definitely, investigate the whole thing and let’s find out who knew what, when and what else was discussed.