Basically, posting a single poll from any source - conservative-leaning, liberal-leaning, obama-favorable, clinton-favoable, just doesn't matter. It's insane because one poll of any sort just doesn't tell you anything substantive in a primary season this complicated.
Real Clear Politics. This is always the kind of source I look for EVERY election cycle. The only way to get slight more substantive information is to find a place that AVERAGES POLLS TOGETHER.
National: RCP Average 04/23 - 04/30 -- 45.1 43.4 Obama +1.7
North Carolina: RCP Average 04/26 - 04/29 -- 48.4 41.2 Obama +7.2
Indiana: RCP Average 04/23 - 04/29 -- 48.0 43.2 Clinton +4.8
As new polls are released, they are averaged in. Notice even the whacky poll numbers from Insider Advantage are factored in to the North Carolina average.
http://www.realclearpolitics.com/epolls/2008/president/democratic_primaries.htmlIf you're too lazy for the link, and can decipher this cut n paste here it is.
Democratic Presidential Nomination
Poll Date Sample Obama Clinton Spread
RCP Average 04/23 - 04/30 -- 45.1 43.4 Obama +1.7
Gallup Tracking 04/28 - 04/30 1229 V 45 49 Clinton +4.0
Rasmussen Tracking 04/27 - 04/30 900 LV 44 46 Clinton +2.0
FOX News 04/28 - 04/29 400 LV 41 44 Clinton +3.0
CBS News/NY Times 04/25 - 04/29 402 LV 46 38 Obama +8.0
NBC/WSJ 04/25 - 04/28 -- 46 43 Obama +3.0
AP-Ipsos 04/23 - 04/27 457 A 46 43 Obama +3.0
Newsweek 04/24 - 04/25 592 RV 48 41 Obama +7.0
North Carolina Democratic Primary
Poll Date Sample Obama Clinton Spread
RCP Average 04/26 - 04/29 -- 48.4 41.2 Obama +7.2
Mason-Dixon 04/28 - 04/29 400 LV 49 42 Obama +7.0
Insider Advantage 04/29 - 04/29 571 LV 42 44 Clinton +2.0
SurveyUSA 04/26 - 04/28 727 LV 49 44 Obama +5.0
Rasmussen 04/28 - 04/28 774 LV 51 37 Obama +14.0
PPP (D) 04/26 - 04/27 1121 LV 51 39 Obama +12.0
Indiana Democratic Primary
Poll Date Sample Clinton Obama Spread
RCP Average 04/23 - 04/29 -- 48.0 43.2 Clinton +4.8
Rasmussen 04/29 - 04/29 400 LV 46 41 Clinton +5.0
TeleResearch 04/25 - 04/29 943 LV 48 38 Clinton +10.0
PPP (D) 04/27 - 04/28 1347 LV 50 42 Clinton +8.0
SurveyUSA 04/25 - 04/27 628 LV 52 43 Clinton +9.0
Howey-Gauge 04/23 - 04/24 600 LV 45 47 Obama +2.0
Research 2000 04/23 - 04/24 400 LV 47 48 Obama +1.0