The right wing is already busy at work attacking President Obama, regarding the decision of Russian leader Vladamir Putin to intervene militarily in Ukraine, putting Russian forces in Crimea, the portion of Ukraine with a majority of Russians, and the center of the Black Sea seaport crucial to the Russian navy, and an important “warm water” port for Russia during the long winters in that nation.
All of us can condemn and deplore this event, and be sad about it to the extreme. But it is not at all surprising in reality, as to expect that Russia would allow an anti Russian government, at least in that part of Ukraine, is living in a dream world!
Major nations who have the power and numbers, historically, do NOT allow their neighbors to be unfriendly or rivals of their nation. Every nation pursues a policy in foreign affairs based on its national interest, and what is possible.
This has been part of the reality of America, as well as the old Soviet Union, China, and any other nation, when they have power and influence, and bemoaned when they do not!
The United States has been fortunate enough to have “weak” direct neighbors in Canada and Mexico, and we have been willing to intervene in Mexico when we have not appreciated their governments or policies, as in the 1840s and in the 1910s.
Yes, we have had Mexico as a “problem” at times since, with undocumented immigrants and drug dealings, but at least we have had a friendly government in Mexico, willing to work with us, and on the same page generally on most issues.
The closest we have had to a national security matter is, of course, Cuba, and we went to the brink in the Cuban Missile Crisis of 1962, and while the Castro brothers still control that island, even today, they are no direct menace to us, and if they were seen as such, we could still use our power to intervene.
So, looking at that reality, that nations with power will use it for their benefit, to have an non-antagonistic direct neighbor on their border, and with economic advantages also a consideration, along with defense and naval matters, there is, sadly, little we can do about Ukraine, except hope for a minimal involvement in that nation by the Russians, but the thought of a military or nuclear response is totally insane, and could not be utilized!
Keep in mind that President Dwight D. Eisenhower could do nothing about Soviet involvement in its neighbors, Poland, East Germany, and Hungary, and neither could Lyndon B. Johnson do anything about Soviet involvement in Czechoslovakia!