WHITE PLAINS, N.Y. — A federal judge imposed an unusual election system on a suburban village Friday, nearly two years after finding that the existing system was unfair to Hispanics. The village, Port Chester, is run by a mayor and six trustees. Under the new system, called cumulative voting, residents will be allowed to cast as many as six votes for one trustee candidate. No Hispanic had ever been elected trustee or mayor in the village 25 miles northeast of New York City, although the population of 28,000 is about half Hispanic. The ruling is likely to mean that the...