Finally, Democrats are poised to take center stage in their quest to hold onto the oval office for another four year term. By law, President Obama is prohibited from seeking a third term. On Tuesday, the Democrats will host their first of four debates in the 2016 presidential campaign season. It will take place in Las Vegas, Nevada. CNN will provide a two hour coverage of this debate. It will be moderated by Anderson Cooper, who will be assisted by Dana Bash, Juan Carlos Lopez and Don Lemon.