From NBC's Mark Murray
Mason-Dixon has released new polls for the battlegrounds of Florida and Virginia -- and they show tight races in these two states.
In Florida, McCain holds a narrow one-point lead over Obama, 46%-45%. Earlier this month, another Mason-Dixon poll showed Obama with a two-point advantage in the Sunshine State, 48%-46%.
And in Virginia, Obama is up two points, 47%-45%; earlier this month, McCain was ahead by three in the state, 48%-45%.
The polls were conducted in each state from October 20-21, and they both have margin of errors of plus-minus 4%.