Not surprisingly, voters between the ages of 18 and 29 were less likely to vote for Bush than voters of all other age groups. Maybe a bit more surprising...the most Bush-friendly/least Kerry-friendly age group was not the 30-44 range but instead was voters 60 and over (by a thin margin--Bush had one percentage point more from that group than the 30-44 group). When compared with voters who are 60 and over, the 18-29 age group had a vote total for Bush of nine percentage points less.
State-by-state exit-poll comparisons (for this and other demographics) are available (both nationally, and by state here):
http://www.cnn.com/ELECTION/2004/pages/results/states/US/P/00/epolls.0.html
Here's the data:
State Bush/Kerry 18-29 Bush/Kerry 60+ "Bush 18-29" minus "Bush 60+"
AL 57-41 70-30 -13
AK 59-37 66-32 -7
AZ 50-48 55-45 -5
AR 47-51 48-52 -1
CA 39-58 46-52 -7
CO 47-51 56-43 -9
CT 29-70 55-44 -26
DE 45-54 46-53 -1
DC 8-90 12-87 -4
FL 41-58 52-47 -11
GA 52-47 64-36 -12
HI 39-61 50-50 -11
ID 65-35 69-30 -4
IL 35-64 52-48 -17
IN 52-47 61-39 -9
IA 46-53 48-51 -2
KS 55-44 54-45 +1
KY 54-45 64-36 -10
LA 53-45 66-34 -13
ME 50-48 45-54 +5
MD 35-62 40-59 -5
MA 26-72 37-61 -11
MI 43-55 47-52 -4
MN 41-57 50-49 -9
MS 37-63 69-30 -32
MO 48-51 52-47 -4
MT 52-43 43-51 +9
NE 60-38 65-35 -5
NV 42-56 53-46 -11
NH 43-57 47-52 -4
NJ 35-64 44-56 -9
NM 50-49 44-55 +6
NY 25-47 47-53 -22
NC 43-56 57-43 -14
ND 68-32 52-44 +16
OH 42-56 57-43 -15
OK 62-38 66-34 -4
OR 37-62 52-48 -15
PA 39-60 52-48 -13
RI 30-68 36-63 -6
SC 51-48 61-39 -10
SD 55-43 59-39 -4
TN 55-44 58-41 -3
TX 61-39 50-50 +11
UT 77-18 70-29 +7
VT 27-71 50-49 -23
VA 46-54 56-44 -10
WA 49-48 48-51 +1
WV 48-52 53-47 -5
WI 41-57 49-51 -8
WY 72-25 67-32 +5
USA 45-54 54-46 -9
Now, the variable sample size (and thus variable margins of error) will make for some occasionally strange output, so we'll essentially look at cases where the percentage difference is 10 or greater. What's noteworthy are the states where the youngsters voted much more for Kerry and less for Bush than the 60+ crowd. These states include 2 New England states that have trended very strongly Dem in recent years--Connecticut and Vermont--so much that the old people who were in their prime when those states were still fairly Republican (not that long ago!) still voted more for Bush than Kerry!!! However, even more importantly, the Deep South states are in this category--with Mississippi having an astonishing 32 point difference between the old Bush vote and the young Bush vote (with youngsters preferring Kerry 63 to 37)! Louisiana, Alabama, Georgia, Florida and both Carolinas had 10 point or greater differences between the old Bush vote and young Bush vote (with Florida and North Carolina--and of course Mississippi--have strong Kerry margins among 18-29 year-olds). While these states have trended Republican in recent years, they haven't necessarily trended Conservative--and maybe some of the younger people in some of these states are ready to rebel against the conservative establishment.
Note that North Dakota and Texas were the most skewed states towards younger people voting more for Bush than the older people. They were the only 2 states where young people's Bush % was 10 points or more greater than the older people's %. Other states that were close were in the Western US (Montana, Utah, New Mexico).
While migration patterns and changes in conditions (like the economy) will probably determine how a state will vote for President in the future more than this, it's still important to note how much more for Kerry/less for Bush the young are voting. This gives some hope that all is not lost in the South--but we clearly have a lot of work to do to "save" the South from the Republican darkness.