The Cook/RT Strategies findings show the following:
All Voters Democrats Republicans Independents
Clinton 41 75 10 38
McCain 45 17 83 42
Obama 45 71 14 50
McCain 43 17 79 35
On the surface, the differences between Clinton and Obama -- ranging from 4 to 12 percentage points -- may not appear significant, but in practice elections are won and lost at these and even much smaller margins. Obama runs 4 points behind Clinton among Democrats, 75 to 71, in match-ups with McCain, but he runs 4 points (14-10) and 12 points (50-38) better than Clinton among Republicans and independents.
The patterns in survey testing hypothetical general election contests are consistently reflected in the partisan character of the primary vote. In Missouri's Tuesday election, for example, Clinton won regular Democrats by a solid 8 points, 51-43; but she lost independents voting in the Democratic primary to Obama by 28 points, 31-59, and the small fraction of Republicans casting votes in the Democratic primary by 50 points, 21-71.
Similarly in New Jersey on Tuesday, Democratic voters backed Clinton 51-47 while independents went with Obama 53-40.
Even in Clinton's home state, New York, Obama won independents 56-38, while Clinton won Democrats, 60-38.