Will a Kansas Tea Partier help the Democrats retain their Senate majority? It has occasionally been claimed that the Civil War began not at Fort Sumter in South Carolina but on the banks of a small creek in Kansas, where John Brown and his sons murdered five men in what later became known as the “Pottawatomie massacre.” Today, a less grisly civil war is being fought throughout that state between disgruntled supporters of Tea Party candidate Milton Wolf and “establishment” Republicans working to reelect Senator Pat Roberts, who defeated Wolf in a hard fought GOP primary. This internecine conflict may...