Final US presidential campaigns

The US presidential rivals have been targeting key swing states with just one more day of campaigning left in the race for the White House.



In Ohio yesterday, Democrat and front-runner Barack Obama told voters they were two days away from changing America.



Republican John McCain urged supporters in Pennsylvania to knock on doors to bring out more votes.



Both camps are keenly aware of the need to get voters out in key states, which polls suggest remain in the balance.



Ohio, a narrow Republican win in 2004, has 20 votes under the electoral college system used in US presidential elections, making it one of the largest undecided states.



Pennsylvania boasts 21 electoral votes and chose the Democrats in 2004.



Despite more gloomy news from the opinion polls on Sunday, McCain told supporters in Wallingford that he will win in Pennsylvania and ultimately the election.



The BBC\'s Matthew Price, said McCain has been focusing on conservative Democrats, and independent-minded voters, who live in economically depressed areas of the state.



The Arizona senator has appeared more relaxed and confident in recent days and his campaign believes he is staging a comeback.



But most polls suggest he may have left it too late.



On Sunday, a CNN/Opinion Research Corporation national survey suggested Obama had a seven-point lead over McCain in the race for the White House.