FILE -This photo Aug. 11, 2012 file photo shows North Dakota Senate candidate Heidi Heitkamp speaking in Dickinson, N.D. What does a pair of Senate candidates do when their state is booming amid a sluggish national economy? They focus on personal style. That's the case in North Dakota, where Democrat Heidi Heitkamp and Republican congressman Rick Berg are waging a surprisingly tight race for an open Senate seat. (AP Photo/Dale Wetzel, File )

Associated Press
FILE -This photo Aug. 11, 2012 file photo shows North Dakota Senate candidate Heidi Heitkamp speaking in Dickinson, N.D. What does a pair of Senate candidates do when their state is booming amid a sluggish national economy? They focus on personal style. That's the case in North Dakota, where Democrat Heidi Heitkamp and Republican congressman Rick Berg are waging a surprisingly tight race for an open Senate seat. (AP Photo/Dale Wetzel, File )
FILE -This photo Aug. 11, 2012 file photo shows North Dakota Senate candidate Heidi Heitkamp speaking in Dickinson, N.D. What does a pair of Senate candidates do when their state is booming amid a sluggish national economy? They focus on personal style. That's the case in North Dakota, where Democrat Heidi Heitkamp and Republican congressman Rick Berg are waging a surprisingly tight race for an open Senate seat. (AP Photo/Dale Wetzel, File )
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