Jim: It should be noted that Time/CNN is polling registered
voters, while both Rasmussen and SurveyUSA are filtering responses
to isolate likely voters. The latter two firms might not be
capturing likely voters correctly, of course, but they both have a
pretty good track records, and I’m inclined to distrust a poll that
makes no attempt to measure the enthusiasm gap between Republicans
and Democrats in this cycle — which is to say, I’m inclined to
suspect the Time/CNN sample includes dispirited Democrats who are
unlikely to make it to the polls, and thus to take it with a grain
of salt.
Tim*| 9.8.10 @ 9:13PM
Rasmussen begins counting in "Leaners " as their primary polling technique , after Labor Day , as election attention ramps up .
Thus :
" Paul is now supported by 54% of Likely Voters in Kentucky, when leaners are added, while Democrat Jack Conway earns the vote from 39%. Two percent (2%) prefer another candidate, and four percent (4%) are undecided...
Leaners are those who initially indicate no preference for either of the candidates but answer a follow-up question and say they are leaning towards a particular candidate. From this point forward, Rasmussen Reports considers results with leaners the primary indicator of the race. "