Paul Bonicelli: While the United States dithers, Poland acts

 The ongoing crisis launched by Russian President Vladimir Putin has left the Obama administration struggling to figure out how to respond to three scenarios: First, the possible invasion of Ukraine's eastern provinces by the Russian troops massed near the border; second, the contingency that Russia might simply continue to rattle its saber, threatening energy supplies and stirring up unrest among ethnic Russians in neighboring states; and third, the fait accompli of the annexation of Crimea. So far the president hasn't offered encouraging answers.