Along with Florida, Ohio, and Pennsylvania, North Carolina is in the top tier of battleground states this presidential election -- with 15 electoral votes up for grabs. The Tarheel State has been one of the closest states overall in the past two elections -- Barack Obama won it in 2008 and lost it in 2012. And this year, since their nominating conventions, not a week has gone by without a visit to the state by either Hillary Clinton and Donald Trump, or their running mates. NewsHour Weekend Special Correspondent Nick Schifrin introduces us to the some of the people trying to keep North Carolina red, and those trying to turn it back to blue. ALSO: Some voters fed up with being ignored by the candidates so focused on those battleground states are experimenting with vote swapping across state lines. NewsHour Weekend Special Correspondent Karla Murthy will explain how this works.