If you desire to be pure have firm faith and slowly go on with your devotional practices without wasting your energy in useless scriptural discussions and arguments. Your little brain will otherwise be muddled.
With respect to Barack Obama let's face it Barack Obama is an iconic figure in the African-American community. We respect that. We understand that. African-Americans are going to vote for the first black president especially when he happens to share the liberal politics on economic issues that many in that community hold.