poll source                  dates administered democrat : carl levin republican : jack hoogendyk  lead margin
0       rasmussen reports                    october 8 , 2008                   61%                         36%           25
1        strategic vision  september 22 - september 24 , 2008                   57%                         29%           28
2              epic - mra  september 14 - september 17 , 2008                   54%                         26%           28
3       rasmussen reports                 september 10 , 2008                   57%                         38%           19
4   public policy polling    september 6 - september 7 , 2008                   51%                         36%           15
5        strategic vision    september 5 - september 7 , 2008                   58%                         28%           20
6              epic - mra        august 18 - august 21 , 2008                   59%                         27%           32
7       rasmussen reports                     august 7 , 2008                   57%                         39%           18
8   public policy polling            july 23 - july 27 , 2008                   54%                         35%           19
9       rasmussen reports                      july 10 , 2008                   59%                         36%           23
10  public policy polling            june 21 - june 22 , 2008                   54%                         32%           22
11      rasmussen reports                      june 11 , 2008                   55%                         35%           20

Table as JSON:
{"poll source":{"0":"rasmussen reports","1":"strategic vision","2":"epic - mra","3":"rasmussen reports","4":"public policy polling","5":"strategic vision","6":"epic - mra","7":"rasmussen reports","8":"public policy polling","9":"rasmussen reports","10":"public policy polling","11":"rasmussen reports"},"dates administered":{"0":"october 8 , 2008","1":"september 22 - september 24 , 2008","2":"september 14 - september 17 , 2008","3":"september 10 , 2008","4":"september 6 - september 7 , 2008","5":"september 5 - september 7 , 2008","6":"august 18 - august 21 , 2008","7":"august 7 , 2008","8":"july 23 - july 27 , 2008","9":"july 10 , 2008","10":"june 21 - june 22 , 2008","11":"june 11 , 2008"},"democrat : carl levin":{"0":"61%","1":"57%","2":"54%","3":"57%","4":"51%","5":"58%","6":"59%","7":"57%","8":"54%","9":"59%","10":"54%","11":"55%"},"republican : jack hoogendyk":{"0":"36%","1":"29%","2":"26%","3":"38%","4":"36%","5":"28%","6":"27%","7":"39%","8":"35%","9":"36%","10":"32%","11":"35%"},"lead margin":{"0":25,"1":28,"2":28,"3":19,"4":15,"5":20,"6":32,"7":18,"8":19,"9":23,"10":22,"11":20}}