In 1997 Gallup polled that 27% of the American public supported gay marriages. After peaking at 46% in 2007, that percentage dipped to 40% in 2008 and stayed at that level in Gallup's May 2009 poll. Although support for Gay Marriage slipped somewhat from its all time 2007 high, it remains 13% higher now than it was in 1997, with acceptance of Gay Marriage polling strongest in the 18-29 age bracket, with 59% of that age group in favor of it. For those who support Gay Marriage, the long term trend line is clearly positive.
CQ Politics posts a graph of changing polling results on Gay Marriage between 1997 and 2009 here:
http://blogs.cqpolitics.com/polltracker/2009/05/support-for-legalizing-gay-mar.html Gallup has also been polling the relative strengths of the "Pro-Choice" and "Pro-Life" positions in regards to abortion since 1995, with "Pro-Choice" sentiments establishing a high water polling mark of 56% in that year. Gallup's most recent poll in July 2009 shows Americans almost evenly divided in their current attitudes, with 47% identified as "Pro-Life" and 46% identified as "Pro-Choice". A graph of Gallup polls on this question can be found at:
http://www.gallup.com/poll/122033/U.S.-Abortion-Attitudes-Closely-Divided.aspx Like many polling outfits, the validity of Gallup polling has been called into question on more than one occasion. Personally I would not stand by their specific numbers any more than I would by a leaking nuclear reactor. But I don't think there is much real argument about the overall long term polling trend line regarding abortion rights. Support for a pro-choice position was clearly stronger in the past, while support for Gay Marriage overall has been increasing.
Why is that? The answers to that question will ultimately determine the future abortion rights of women in America. The Stupak amendment is only the latest skirmish in that ongoing battle, with pro-choice advocates increasingly being forced into a defensive position.