The 2016 Democratic presidential candidates vowed to take the high road, focusing on the issues and avoiding the personal attacks and juvenile insults that have characterized the Republican primary. But Hillary Clinton and Bernie Sanders and their surrogates have both punched lower and lower as the race has gotten tighter, questioning their opponent's qualifications and integrity and accusing each other of smears, tricks, and lies. It's gotten so nasty that the two former colleagues refused to even shake hands Thursday night when their debate ended.
Has the Democratic primary gotten too ugly? Or is mudslinging just the nature of political battle?