Interestingly, the change of opinion is seen within all age
groups: those in the age group of 18-29 years saw the percentage in
favour increase from 45% in 2003 to 62% in 2011 while the
percentages in the age group 50-64 rose from 27% to 41%.
The recent PEW-data give a highly detailed
insight in the US-opinions on same sex couples. We learn for
instance that Catholics are on average much more tolerant of gay
marriages than Protestants, but the most important divide is the
political divide with 26% of Republicans favouring gay marriage
opposed to 57% of Democrats.
For Obama's campaign coffers it is noteworthy that generally
those Americans with higher incomes are more supportive of gay
marriage: in the income group of $100.000+, 58% are in
favour against 35% opposing. Under $50.000 the distribution is
roughly 50/50.