I thought Obama was smart to not sabre-rattle in his speech, and has clearly instead left that up to his United Nations and Pentagon people...the political fallout is far less if THEY talk that tough, tough talk that SHOULD be directed towards Russia (and we don't know what we said to Putin one on one in that phone call) but I like the seeming decision for Obama to project calm and leave the aggressive tone to those other parties.
krellin, you yourself would have to admit--Obama is NOT very good at sounding like the tough guy...talking to a chair or no, Clint Eastwood he ain't! ;) Obama's always been far better, as a communicator, at being a light-hearted "nice guy" or being a sort of calm speaker...he's not like Teddy Roosevelt or Dwight Eistenhower, people that could sound a lot firmer, or heck, even Richard Nixon, who could pull off the sabre-rattling.
So I like his seeming decision (politically motivated though it undoubtedly was) to project calmness and leave the more aggressive tones to the people who frankly do it better. Better he play to his strengths and not embarrass himself--and us--by trying to sound like something and someone he isn't, rather than have him pull off a phony "tough guy" act and have Putin call him on it...THAT would cost us a lot of momentum in this case.