It's been an undercurrent of Barack Obama's historic run for the White House. But in the past week , race has once again become a very open part of his presidential campaign. First there was Jesse Jackson's off-air remarks on Fox News about the Illinois Senator. SOUNDBITE: Reverend Jesse Jackson saying (English): "See, Barack been, um, talking down to black people on this faith base - I want to cut his n**s off. "Barack he's talking down to black people." Over the weekend, it was the satirical cover of the New Yorker magazine featuring a cartoon of Barack Obama in a turban and Michelle Obama with an afro, a machine gun, and combat boots that focused attention once again on Obama's position as America's first black presidential nominee. The Brookings Institution's Darrell West. SOUNDBITE: Darrell West, senior research fellow, the Brookings Institution, saying (English): "I think when you nominate someone from an...