For what it's worth, here are the results of a poll of 1,010 adults from May 6-27 conducted by the Scripps Survey Research Center at Ohio University. Respondents were asked a series of questions about what they believe most Americans "will accept" or "will not accept" in a president. I've sorted the results in descending order:

Most Americans Will Accept
A white president who has adopted a black child = 84%
A wealthy president = 76%
A president who's lived in Washington, D.C., for more than 20 years = 74%
A president who smoked pot when young = 69%
A president who currently smokes cigarettes = 66%
A black president = 55%
A woman president = 52%
A president who voted for the Iraq war while in Congress = 52%
A pro-choice president = 49%
A president who has been married three times = 46%
A mormon president = 39%
A president who takes office at the age of 72 = 36%
A president who tried cocaine when young = 34%
A president who has very little government experience = 34%

I don't know that it's wise to make too many assumptions about these results. That said, if you glance down the list Barack Obama would seem be the one facing the most significant hurdles, two of which have nothing to do with the color of his skin.

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