What should Obama do? Remember that a lot of republicans will attack him for using force.
1. "First, President Obama should speak unequivocally and call this what it is: a military invasion. The Obama administration must publicly acknowledge that its “reset” with Russia is dead.
2. The United States should convene an emergency meeting of NATO to develop a strong united response...
3. Third, the United States should rally our allies to boycott this JuneÂ’s G-8 summit ...
4. Fourth, any and all discussions and negotiations with Moscow on any issue unrelated to this crisis, including trade and other matters, should be immediately suspended.
5. Fifth, the U.S. and our allies should put forward a condemnatory resolution in the United Nations Security Council.
6. ...renew a push for eventual membership in NATO by the Republic of Georgia and aim to provide the country with some of the defensive capabilities the Georgians have requested...
7. ...Obama administration should immediately add more Russian officials to the Magnitsky list, which places travel bans and other sanctions on them – something President Obama failed to do in December.
8. ....Majority Leader Harry Reid should immediately halt his effort to force a Senate vote on Rose Gottemoeller next week to be under secretary of state for arms control and international security. ... Ms. Gottemoeller, who has tried to play down and potentially kept information from Congress and our allies about Russian violations of arms-control agreements."
8 Steps Obama Must Take to Punish Russia - Marco Rubio - POLITICO Magazine