President Bush and challenger John Kerry are making a final push for votes with just two days left before Americans elect their next president.
The Republican incumbent campaigns in Florida and Ohio today (Sunday), while his Democratic rival visits Florida and New Hampshire.
The candidates remain focused on security issues after the release of a new Osama bin Laden video.
In an interview with ABC television aired today, Mr. Kerry repeated his vow to fight a more effective war on terror.
In Miami, Mr. Bush accused his opponent of being "consistently wrong" on national security matters.
Polls show the two men tied both at the national level and in key states that will decide which one gets the 270 electoral votes needed for victory.