Being first is "much better than being in a different position, but I do realize this is a marathon, not a sprint, and there will be ups and downs," Republican presidential candidate Ben Carson says in interview with Bloomberg Politics. NOTE: Carson has taken lead in Iowa, surpassing Donald Trump, according to Bloomberg Politics/Des Moines Register poll released today; related story Says he would probably drop out of race if his support was much lower, "if other people were polling much higher a
Source: Bloomberg.com news