In an election for President of the United States in Iowa today, 46 days from the election, Democrat Barack Obama defeats Republican John McCain by 11 points, 54% to 43%, according to this latest SurveyUSA poll conducted exclusively for KAAL-TV Mason City and WHO-TV Des Moines.

Among women, Obama leads by 20 points; among men, Obama and McCain tie.  Among voters younger than Barack Obama, Obama leads by 15. Among voters older than John McCain, Obama leads by 9. Among voters who are in-between the two candidates’ ages, Obama leads by 7.  Among white voters — 95% of Iowa’s likely voters — Obama leads by 8 points.  11% of Republicans cross over to vote for Obama; 8% of Democrats cross over to vote for McCain; Independents break for Obama by 9 points.

John McCain leads among Republicans, conservatives, those who attend church regularly, pro-life voters, those focused on terrorism, among the 16% of likely voters who say they may yet change their mind, and in Southwest Iowa. Obama is slightly ahead in Northwest Iowa and leads by double digits in the northeast and southeast portions of the state.

Full results of this poll can be found here .