America on Parade -- PICTURES

A Chihuahua celebrates America in an annual Fourth of July parade in the McKinney, Texas, town square. ((Michael Prengler/Special Contributor))

Republican presidential candidate Mitt Romney gives a thumbs up as he carries his granddaughter Soleil while walking in the Fourth of July Parade in Wolfeboro, N.H., Wednesday, July 4, 2012. (AP Photo/Charles Dharapak)

Jack McCardle, wearing a dress, waits for the start of the annual parade on Wednesday, July 4, 2012, in Sausalito, Calif. McCardle has marched at the end of the parade for 30 years. (AP Photo/Eric Risberg)

Mitt Romney, Ann Romney, and Sen. Kelly Ayotte, R-N.H., walk in the Fourth of July Parade in Wolfeboro, N.H. (CHARLES DHARAPAK/AP)

Democratic Senate candidate Bob Kerrey waves to spectators at a July Fourth parade in Omaha, Neb., on Wednesday, July 4, 2012. (AP Photo/Nati Harnik)

A pair of miniature Schnauzers ride in a wagon pulled by City Council member Herb Weiner during the annual Fourth of July parade on Wednesday, July 4, 2012, in Sausalito, Calif. (AP Photo/Eric Risberg)

Mitt Romney and Sen. Kelly Ayotte, R-N.H. buy lemonade as they walk in the Fourth of July Parade in Wolfeboro, N.H.

Republican Senate candidate, State Sen. Deb Fischer speaks to two young supporters at a July Fourth Parade in Omaha, Neb., Wednesday, July 4, 2012. (AP Photo/Nati Harnik)

Mitt Romney participates in the Fourth of July parade in Wolfeboro, N.H., Wednesday, July 4, 2012.  (AP Photo/Charles Dharapak)

Pollette Bell from the Chicago Chapter of the Buffalo Soldiers loads her pony, Snowball, into his trailer after participating in the annual Hyde Park Independence Day parade Wednesday, July 4, 2012, in Chicago. (AP Photo/Sitthixay Ditthavong)

Republican Senate candidate, state Sen. Deb Fischer (left) and Democratic Senate candidate Bob Kerrey (right) shake hands during a chance encounter at a July 4th parade in Omaha, Neb., Wednesday, July 4, 2012. The two are vying for the Senate seat vacated by retiring Ben Nelson, D-Neb.

Young fans show their excitement for the start of the annual Fourth of July parade in the McKinney, Texas, town square. (Michael Prengler/Special Contributor)