Romney Around the World -- PICTURES

A campaign sticker for Republican presidential candidate Mitt Romney is seen on a sign for Romney Street in London on July 25, as Romney arrives in London to meet with world leaders, hold fundraisers, and attend the opening of the Olympic Games.    (AP Photo/Charles Dharapak)

Mitt Romney arrives at 10 Downing Street in London on July 26 to meet with Prime Minister David Cameron. (AP Photo/Jason Reed, Pool)

Mitt Romney meets with British Prime Minister David Cameron at 10 Downing Street in London on July 26.   (AP Photo/Charles Dharapak)

With the headline "Mitt the Twit," the July 27 edition of The Sun newspaper criticizes comments Mitt Romney made regarding the London Olympics.   (AP Photo/Charles Dharapak)

Mitt Romney meets with Irish Prime Minister Enda Kenny at the Embassy of Ireland in London on July 27.   (AP Photo/Charles Dharapak)

Mitt and Ann Romney wave during the Opening Ceremony of the 2012 Olympic Summer Games at the Olympic Stadium in London on July 28.   (AP Photo/Toby Melville, Pool)

Swimmer Breeja Larson of the United States poses for a photograph with Mitt Romney during heats at the Aquatics Centre during the 2012 Summer Olympics in London on July 28. (AP Photo/Michael Sohn)

Mitt Romney is presented with a booklet as he visits the Western Wall in Jerusalem on July 29.   (AP Photo/Dan Balilty)

Mitt Romney meets with Israeli Prime Minister Benjamin Netanyahu in Jerusalem on July 29.   (AP Photo/Charles Dharapak)

Israeli President Shimon Peres and Mitt Romney meet at the president's residence in Jerusalem on July 29.   (AP Photo/Ronen Zvulun, Pool)

Mitt Romney places a prayer note as he visits the Western Wall in Jerusalem on July 29.    (AP Photo/Charles Dharapak)

Mitt Romney walks with Palestinian Prime Minister Salam Fayyad in Jerusalem on July 29.   (AP Photo/Charles Dharapak)

Mitt Romney greets audience members after he delivered a speech in Jerusalem on July 29. ((AP Photo/Charles Dharapak))

Mitt and Ann Romney greet the crowd outside the Old Town Hall in Gdansk, Poland, on July 30.   (AP Photo/Charles Dharapak)

Mitt Romney meets with Poland's Prime Minister Donald Tusk at The Gdansk Old Town Hall, in Gdansk, Poland, Monday, July 30. (AP Photo/Charles Dharapak)

Mitt Romney meets with Poland's former President Lech Walesa, Monday, July 30, in Artus Court, in Gdansk, Poland.   (AP Photo/Charles Dharapak)

Mitt Romney speaks at the University of Warsaw Library in Warsaw, Poland, Tuesday, July 31.   (AP Photo/Charles Dharapak)

Mitt Romney, his wife Ann, and Warsaw Mayor Hanna Gronkiewicz visit the Memorial of the Warsaw Uprising in Warsaw, Poland, Tuesday, July 31, 2012. (AP Photo/Charles Dharapak)