riddle - separate with a riddle, as grain from chaff screen sift, sieve, strain - separate by passing through a sieve or other straining device to separate out coarser elements; sift the flour
Causes of the Civil War: Slavery and Control of the Government. Throughout the first half of the 19th century, Southern politicians sought to defend slavery by retaining control of the federal government.
Political and Economic Causes of the American Civil War. 1  White House, residence and office of the President of USA. 2  On the one hand, political and economic reasons were mutually exclusive; on the other hand, these were overlapping.