[cnn-photo-caption image= http://i2.cdn.turner.com/cnn/2008/POLITICS/10/23/king.north.carolina/art.mccainobama.gi.jpg caption="Both Sens. John McCain and Barack Obama are campaigning hard in states that President Bush won in 2004."]
CHARLOTTE, North Carolina (CNN) - It is a methodical routine: House by house, Mary Boyd walks to the door and carefully affixes an election guide to the doorknob.
Boyd is a foot soldier of the Mecklenberg County Republican Party, charged with finding - and helping deliver - every available GOP vote.
"And the best way to do that is to take a list of registered Republican households and take a piece of literature and leave it right on their door so that they have easy access to the information," Boyd cheerfully said during her rounds in a Charlotte neighborhood this week.
It is Boyd's third presidential campaign as precinct captain; twice before, she has walked these streets for a ticket led by George W. Bush.
This year is very different.