(CNN) - John McCain campaigns in Ohio Sunday. The state put President Bush over the top in his re-election bid four years ago, and it could all come down to Ohio and its 20 electoral votes this time around. John McCain holds rallies today in Westerville and Toledo, Ohio. The most recent CNN Poll of Polls in Ohio suggests that 48 percent of voters there are backing Barack Obama and 46 percent support McCain, with six percent undecided.
Obama campaigns in North Carolina Sunday, a once reliably Republican state in presidential contests that is now up for grabs. The last Democratic presidential candidate to win North Carolina was Jimmy Carter in 1976. But the most recent CNN/Time Magazine/Opinion Research Corporation poll in the state has the contest deadlocked at 49 percent.
As for the running mates, Republican Vice Presidential nominee Sarah Palin holds a rally in New Mexico Sunday. The state narrowly went for President Bush four years ago, but Obama is up by five points in the state according to Albuquerque Journal survey of New Mexico voters conducted at the beginning of the month.
Democratic Vice Presidential nominee Joe Biden holds a campaign rally in Tacoma, Washington Sunday. Recent polls in that state suggest Obama has a ten point lead there.