US-VOTE-2012-DEMOCRATIC CONVENTION

Sheriff Michael Johnson of Clayton County, Georgia (C) runs along side a group of bicycle police at the corner of West 5th Street and North Tryon Street near the Time Warner Cable Arena September 6, 2012 in Charlotte, North Carolina on the final day of the 2012 Democratic National Convention. Johnson and his fellow sheriffs use humour in their moves as they direct traffic and pedestrians. AFP PHOTO Stan HONDA (Photo credit should read STAN HONDA/AFP/GettyImages)

US-VOTE-2012-DEMOCRATIC CONVENTION

Sheriff Michael Johnson of Clayton County, Georgia directs traffic at the corner of West 5th Street and North Tryon Street near the Time Warner Cable Arena September 6, 2012 in Charlotte, North Carolina on the final day of the 2012 Democratic National Convention. Johnson and his fellow sheriffs use humour in their moves as they direct traffic and pedestrians. AFP PHOTO Stan HONDA (Photo credit should read STAN HONDA/AFP/GettyImages)

US-VOTE-2012-DEMOCRATIC CONVENTION

Sheriff Michael Johnson of Clayton County, Georgia (L) directs a pedestrian at the corner of West 5th Street and North Tryon Street near the Time Warner Cable Arena September 6, 2012 in Charlotte, North Carolina on the final day of the 2012 Democratic National Convention. Johnson and his fellow sheriffs use humour in their moves as they direct traffic and pedestrians. AFP PHOTO Stan HONDA (Photo credit should read STAN HONDA/AFP/GettyImages)

US-VOTE-2012-DEMOCRATIC CONVENTION

Sheriff Michael Johnson of Clayton County, Georgia directs traffic at the corner of West 5th Street and North Tryon Street near the Time Warner Cable Arena September 6, 2012 in Charlotte, North Carolina on the final day of the 2012 Democratic National Convention. Johnson and his fellow sheriffs use humour in their moves as they direct traffic and pedestrians. AFP PHOTO Stan HONDA (Photo credit should read STAN HONDA/AFP/GettyImages)

US-VOTE-2012-DEMOCRATIC CONVENTION

Sheriff Michael Johnson of Clayton County, Georgia directs traffic at the corner of West 5th Street and North Tryon Street near the Time Warner Cable Arena September 6, 2012 in Charlotte, North Carolina on the final day of the 2012 Democratic National Convention. Johnson and his fellow sheriffs use humour in their moves as they direct traffic and pedestrians. AFP PHOTO Stan HONDA (Photo credit should read STAN HONDA/AFP/GettyImages)

US-VOTE-2012-DEMOCRATIC CONVENTION

Sheriff Michael Johnson of Clayton County, Georgia directs traffic at the corner of West 5th Street and North Tryon Street near the Time Warner Cable Arena September 6, 2012 in Charlotte, North Carolina on the final day of the 2012 Democratic National Convention. Johnson and his fellow sheriffs use humour in their moves as they direct traffic and pedestrians. AFP PHOTO Stan HONDA (Photo credit should read STAN HONDA/AFP/GettyImages)

US-VOTE-2012-DEMOCRATIC CONVENTION

Sheriff Michael Johnson of Clayton County, Georgia directs traffic at the corner of West 5th Street and North Tryon Street near the Time Warner Cable Arena September 6, 2012 in Charlotte, North Carolina on the final day of the 2012 Democratic National Convention. Johnson and his fellow sheriffs use humour in their moves as they direct traffic and pedestrians. AFP PHOTO Stan HONDA (Photo credit should read STAN HONDA/AFP/GettyImages)

US-VOTE-2012-DEMOCRATIC CONVENTION

Sheriff Michael Johnson of Clayton County, Georgia directs traffic at the corner of West 5th Street and North Tryon Street near the Time Warner Cable Arena September 6, 2012 in Charlotte, North Carolina on the final day of the 2012 Democratic National Convention. Johnson and his fellow sheriffs use humour in their moves as they direct traffic and pedestrians. AFP PHOTO Stan HONDA (Photo credit should read STAN HONDA/AFP/GettyImages)

US-VOTE-2012-DEMOCRATIC CONVENTION

Sheriff Michael Johnson of Clayton County, Georgia plays with a boy's fan as he helps a famly in a crosswalk at the corner of West 5th Street and North Tryon Street near the Time Warner Cable Arena September 6, 2012 in Charlotte, North Carolina on the final day of the 2012 Democratic National Convention. Johnson and his fellow sheriffs use humour in their moves as they direct traffic and pedestrians. AFP PHOTO Stan HONDA (Photo credit should read STAN HONDA/AFP/GettyImages)

US-VOTE-2012-DEMOCRATIC CONVENTION

Sheriff Michael Johnson of Clayton County, Georgia (R, in yellow vest) directs a group of bicycle police at the corner of West 5th Street and North Tryon Street near the Time Warner Cable Arena September 6, 2012 in Charlotte, North Carolina on the final day of the 2012 Democratic National Convention. Johnson and his fellow sheriffs use humour in their moves as they direct traffic and pedestrians. AFP PHOTO Stan HONDA (Photo credit should read STAN HONDA/AFP/GettyImages)

US-VOTE-2012-DEMOCRATIC CONVENTION

Sheriff Michael Johnson of Clayton County, Georgia (R, in yellow vest) directs a bicyclist at the corner of West 5th Street and North Tryon Street near the Time Warner Cable Arena September 6, 2012 in Charlotte, North Carolina on the final day of the 2012 Democratic National Convention. Johnson and his fellow sheriffs use humour in their moves as they direct traffic and pedestrians. AFP PHOTO Stan HONDA (Photo credit should read STAN HONDA/AFP/GettyImages)