The victory of Republican Karen Handel in the special election in Georgia's 6th Congressional District on Tuesday has discouraged Democrats and encouraged Republicans. Democrat Jon Ossoff won 48.1 percent in the special election's first round April 18, and Democrats had high hopes that they could take this House seat from the Republicans. But even with $30 million spent -- in what became the most expensive House race ever -- and with a turnout of 260,000 (more than the 210,000 who voted in the 2014 midterm), Ossoff won exactly 48.1 percent again. Not quite enough. Georgia's 6th District was significant because...