The conflict in eastern Ukraine may be simmering, but political infighting in Kiev is heating up. On Jan. 31, the Self Reliance Party of Ukraine's ruling coalition called for a no-confidence vote against Prime Minister Arseniy Yatsenyuk, threatening to leave the coalition if parliament did not hold the vote. But whether the prime minister retains his position is a moot point. Kiev will need to shake up its government to retain any semblance of stability, and the upheaval will only complicate Ukraine's position in the broader standoff between Russia and the West....