33 Zogby state polls vs. corresponding polls at electoral-vote.com.

Obama's Zogby's 33 state margin is 4.38% higher than polls at electoral-vote.com.
There are 7.4% more undecided/other voters in the Zogby states
Obama's Zogby vote shares are an average 1.5% lower.
McCain's Zogby vote shares are an average 5.9% lower.

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All state polls (including 33 Zogby)
Average Obama MCain
Zogby 44.71 38.82
EVote 45.84 42.84
Spread -1.13 -4.02

Zogby average poll spread from electoral-vote.com
Obama -1.51
McCain -5.89
Increase in Obama Margin: +4.38

* indicates absolute margin spread is at least 7% (17 states)

..... ElecVote.....Zogby.......Spread....Incr BO
State BO JM BO JM BO JM margin
AL 36 50 36 47 0 -3 3
AK 41 45 41 45
AZ* 34 44 42 39 8 -5 13
AR* 40 47 41 39 1 -8 9
CA 56 36 52 32 -4 -4 0

CO 46 43 40 38 -6 -5 -1
CT 55 35 48 32 -7 -3 -4
DC 90 9 90 9
DE 50 41 50 41
FL 44 47 39 43 -5 -4 -1

GA 44 50 38 44 -6 -6 0
HI 61 31 61 31
ID 39 52 39 52
IL* 50 37 52 32 2 -5 7
IN 48 47 39 40 -9 -7 -2

IA 47 42 42 38 -5 -4 -1
KS 37 47 37 47
KY* 35 51 39 44 4 -7 11
LA* 36 52 40 47 4 -5 9
ME 37 26 37 26

MD* 52 39 54 30 2 -9 11
MA* 53 37 54 29 1 -8 9
MI 48 40 47 33 -1 -7 6
MN* 51 42 48 32 -3 -10 7
MS 44 50 44 50

MO* 42 47 42 40 0 -7 7
MT 48 43 48 43
NE 36 52 36 52
NV 42 45 38 38 -4 -7 3
NH* 50 39 40 37 -10 -2 -8

NJ 47 36 49 36 2 0 2
NM* 48 43 49 33 1 -10 11
NY 59 33 51 30 -8 -3 -5
NC* 43 45 47 38 4 -7 11
ND 43 43 38 44

OH 47 43 43 38 -4 -5 1
OK* 38 52 37 42 -1 -10 9
OR* 48 45 49 33 1 -12 13
PA 48 40 46 36 -2 -4 2
RI 55 31 55 31 0 0 0

SC* 39 48 42 41 3 -7 10
SD 34 51 34 51
TN* 36 51 36 41 0 -10 10
TX 39 48 39 42 0 -6 6
UT 31 55 31 55

VT 63 29 63 29
VA* 46 48 44 39 -2 -9 7
WA 55 40 48 35 -7 -5 -2
WV 37 45 37 45
WI 50 40 48 38 -2 -2 0
WY 40 53 40 53

avg 45.84 42.84 44.71 38.82 -1.51 -5.89 4.38