It's not over yet, Obama warns 'cocky' supporters

Barack Obama has urged his supporters to work “like our future depends on it” as the race for the White House focused on a few crucial battleground states at the start of its final week today.

Mr Obama, who unveiled his “closing argument” of hope yesterday, has established more than a seven-point lead over his Republican rival John McCain in the latest average of national polls by RealClearPolitics.com.