By a 48 -- 44 percent margin, American voters say they would vote for the as yet unnamed Democratic party candidate for President over Republican incumbent George W. Bush, according to a Quinnipiac University poll released today. Hampered by Americans' dissatisfaction with life in the U.S. and concerns about war and the economy, President Bush has a 53 -- 39 percent approval rating, the independent Quinnipiac (KWIN-uh-pe-ack) University poll finds.Only 9 percent of American voters are "very satisfied" with the way things are going in the nation today, with 35 percent "somewhat satisfied;" 28 percent "somewhat dissatisfied," and 26 percent...