Come on, guys. Let up on Obama. He did win a Nobel Peace Prize, after all!
Seriously though, while I might not want GWB saying "Let's go git 'em, bang bang", I would like for our President to say, "Mr. Putin, I am not negotiating. You will stop supporting unrest in Crimea. If you do not, the US will back any European-led initiatives, up to an including military action. If Russia directly attacks any NATO ally as a consequence of the situation in Crimea, that will be interpreted as a de-facto declaration of war against that country, and against the United States. If, however, you wish to see Crimea follow a tradition of self-determination and are as concerned as we are by the recent violence, we would welcome a joint US-Russian peacekeeping force to help Crimea through this period of unrest. The decision is yours, Sir."