Articles written by julie pace, ken thomas, associated press

JULIE PACE, KEN THOMAS, Associated Press

HENDERSON, Nev. — President Barack Obama has one mission heading into his first debate with Republican Mitt Romney: Don't screw things up. Less than five weeks from Election Day, Obama has political momentum and an edge in polls of the battleground states that will determine the election. But he's sure to face a blistering challenge from Romney, who needs to use Wednesday's debate in Denver to change the trajectory of the race. AP Photo/Isaac Brekken, File President Barack Obama waves to supporters as he arrives at M...