Presidential hopefuls attempt to protect their leads as they gear up for the first Democratic debate. SUBSCRIBE to ABC NEWS: .\r<br>\r<br>Presidential hopefuls attempt to protect their leads as they gear up for the first Democratic debate. SUBSCRIBE to ABC NEWS: . Make ABC News your daily .\r<br>\r<br>Make ABC News your daily news outlet for breaking national and world news, broadcast video coverage, and exclusive interviews that will help you stay up to .
