President Bush and Democratic challenger John Kerry are trying to make every second count in the final hours before Tuesday's presidential election.
Both candidates plan last-minute campaign stops Tuesday morning, as voters begin casting ballots across the country.
Pre-election opinion polls showed the candidates in a virtual tie, with the race extremely tight in about 10 states. Each of the 50 U.S. states has a certain number of electoral votes based on population, with the winner of the popular vote in most states getting all that state's electoral votes.
Mr. Bush visited six crucial states Monday. He told Republican supporters he is the one who can make the tough decisions and stand by them. He appealed to those he calls "discerning Democrats and wise independents" for their votes.
Democratic Senator John Kerry stopped in four states, saying he can fight a more effective war on terrorism. He also promised to repeal the Bush tax cuts for the wealthiest Americans.