I think this thread really proves my point about why this will not be impeachable.
It's not that Obama knew he could get away with it legally.
It's that he knew he could get away with it politically.
Legally the Obama administration have not provided a legal justification and framework for these drone strikes I believe satisfies in any way, shape or form serious legal questions about whether or not these were constitutional actions.
However, you listen to the overwhelming consent voiced in this thread because it had to do with terrorism and you'll find why he'll never be impeached over it.