SPEARFISH -- Sen. Tom Daschle, D-S.D., said Thursday that he was very concerned about homeland security issues in the face of what he called the most sobering terror report he had heard recently. The United States is tightening security in the face of a steady stream of intelligence indicating an attack aimed at disrupting elections, the White House said Thursday. The Department of Homeland Security is addressing the threat and has efforts underway to ''ramp up security,'' White House press secretary Scott McClellan said Thursday. "It is absolutely essential for the U.S. Senate to turn its attention to what we...