Steve Chapman: Is U.S. credibility at stake in Ukraine?
The Russian aggression against Ukraine seems unsurprising to critics of President Obama, including the crusading editorial board of The Washington Post. An editorial this week blamed the unrest in Donetsk and other eastern cities on the administration's alleged failure to act, and raised a familiar charge. Unless the president does something soon, the United States will "lose what little credibility it retains on Ukraine."