The Obamas in Maine

From left, first lady Michelle Obama, Sasha Obama, President Barack Obama and Malia Obama walk toward Marine One while departing the White House on Friday, July 16, 2010, in Washington. President Obama and his family went to Bar Harbor, Maine, for the weekend.

President Barack Obama arrives in Bar Harbor, Maine, on Friday, July 16, 2010.

President Barack Obama walks with his daughters Malia, right, and Sasha upon their arrival in Bar Harbor, Maine, for a weekend vacation on Friday, July 16, 2010.

President Barack Obama, first lady Michelle Obama and their daughters, Malia, center, and Sasha, left, tour along a trail on Cadillac Mountain during the first family's weekend vacation in Bar Harbor, Maine, on Friday, July 16, 2010.

President Barack Obama, first lady Michelle Obama, daughters Malia and Sasha, visit Cadillac Mountain in Acadia National Park, Bar Harbor, Maine, Friday, July 16, 2010.

President Barack Obama, first lady Michelle Obama and their daughters, Malia, left, and Sasha, not pictured, tour along a trail on Cadillac Mountain during the first family's weekend vacation in Bar Harbor, Maine, on Friday, July 16, 2010.

President Barack Obama, right, speaks with tourists at Cadillac Mountain in Acadia National Park during the first family's weekend vacation in Bar Harbor, Maine, on Friday, July 16, 2010.

President Barack Obama holds an ice cream during the first family's weekend vacation in Bar Harbor, Maine, on Friday, July 16, 2010.

President Barack Obama, first lady Michelle Obama and their daughters, Malia, right, and Sasha, take a boat tour in Frenchman Bay during the first family's weekend vacation in Bar Harbor, Maine, on Friday, July 16, 2010.

President Barack Obama and first lady Michelle Obama takes a boat tour of Frenchman Bay in Bar Harbor, Maine, Friday, July 16, 2010.

President Barack Obama walks with his daughter Malia along the Ship Harbor hiking trail in Acadia National Park during the first family's weekend vacation in Bar Harbor, Maine, on Saturday, July 17, 2010.

First lady Michelle Obama walks with press secretary Katie McCormick Lelyveld and family dog Bo, hidden at left, on the Ship Harbor Trail in Bar Harbor, Maine, Saturday, July 17, 2010.

President Barack Obama, first Lady Michelle Obama and their daughters, Malia, left, and Sasha, walk with their dog Bo as they visit the Bass Harbor Head Light lighthouse during the first family's weekend vacation in Bar Harbor, Maine, on Saturday, July 17, 2010.

President Barack Obama, second right, walks with Chief Tim Chase right, commanding officer of the U.S. Coast Guard station, as he visits the Bass Harbor Head Light lighthouse in Bar Harbor, Maine, with his family on Saturday, July 17, 2010.

Chief Tim Chase, left, commanding officer of the U.S. Coast Guard station, stands next to President Barack Obama, first lady Michelle Obama and their daughters, Malia and Sasha, as they visit the Bass Harbor Head Light lighthouse during the first family's weekend vacation in Bar Harbor, Maine, on Saturday, July 17, 2010.

President Barack Obama waves as he visits the Bass Harbor Head Light lighthouse with First Lady Michelle Obama and their daughters, Malia and Sasha, during the first family's weekend vacation in Bar Harbor, Maine, on Saturday, July 17, 2010.

President Barack Obama, first lady Michelle Obama and their daughters, Malia and Sasha, visit the Bass Harbor Head Light lighthouse during the first family's weekend vacation in Bar Harbor, Maine, on Saturday, July 17, 2010.

President Barack Obama waves from the steps of Air Force One before his departure back to Washington after the first family's weekend vacation in Bar Harbor, Maine, on Sunday, July 18, 2010.

President Barack Obama walks with daughter Malia as first lady Michelle Obama and daughter Sasha step off Marine One on Friday, July 18, 2010, upon returning to the White House in Washington.

President Barack Obama and first lady Michelle Obama walk with their daughters, Malia, second left, and Sasha, on July 18, 2010, upon their return to the White House in Washington.

President Barack Obama chats with daughter Malia while walking from Marine One on Friday, July 18, 2010, upon return to the White House in Washington. President Obama and his family returned to Washington after spending the weekend in Bar Harbor, Maine.

President Barack Obama and First Lady Michelle Obama walks with daughters Malia, right, and Sasha on Sunday, July 18, 2010, upon returning to the White House in Washington after spending the weekend in Bar Harbor, Maine.