Barack Obama: Obama was an Illinois senator vying for the Democratic presidential candidacy in 2008 when he was greeted by 7-month-old Aedyn Buchanan while visiting Stephanie's II, a diner specializing in soul food, in Greensboro, N.C.
Pete Souza/Reuters
cc165d07-6b89-4168-bd01-771f17dfb8d7
Mitt Romney
Mitt Romney: Romney returns a crying baby at a stop outside American Legion Post 176 in Springfield, Va., in September 2012.
Pete Souza/Reuters
8b581072-9154-4b89-b3f0-03b5b0955a24
Barack Obama
Barack Obama: Capt. Greg Wagner and his wife, Meredith, pose for a photo while their 8-month-old son, Cooper Wall Wagner, reaches for President Obama's nose at Kaneohe Marine Corps Base in Hawaii.
Jason Reed/Reuters
2a90737c-aac7-4e33-b7e7-7aa5344a0088
Barack Obama
Barack Obama: Then-Sen. Obama gazes at a baby in Westminster, Colo., in September 2008.
Pete Souza/Reuters
9c5a5ebf-dc65-42ec-8ed4-e056abaf1510
Mitt Romney
Mitt Romney: Romney coaxes a smile from an infant in Orange City, Iowa, in September 2012.
Pete Souza/Reuters
00ae3513-26bf-4422-8fea-e54c933cc172
Barack Obama
Barack Obama: The son of a White House staff member reaches out to touch the president's head during a family visit to the Oval Office in 2009.
Pete Souza/Reuters
d6c91c08-e450-4644-ba0f-1973d48f9424
Barack Obama
Barack Obama: At the start of the annual White House Easter Egg Roll in 2009, President Obama greets young visitors.
Jonathan Ernst /Reuters
880fda54-9ad0-40dc-b65d-faa9a7769a4e
Barack Obama
Barack Obama: As the baby's mother looks on in delight, President Obama holds an infant in Buzzard's Bay, Mass., in August 2011.
Kevin Lamarque/Reuters
4259f2c7-041c-400d-a767-de2c41fbb2cf
Mitt Romney
Mitt Romney: Romney hands an infant back to her mother, airplane-style, at a campaign event in Loveland, Colo., in February 2012.
Rick Wilking/Reuters
e2b94612-45b1-4d7c-bcbe-b5e14319dff3
Barack Obama
Barack Obama: President Obama high-fives a toddler at a food pantry in Washington in November 2010.
Larry Downing/Reuters
02ce2120-598e-4f08-b853-b7113d9b6c95
Mitt Romney
Mitt Romney: Romney talks with a young boy at a stop in Jacksonville, Fla., in January 2012.
Brian Snyder/Reuters
f44b4d74-b584-4f7e-9421-4d0a7669ae8b
Barack Obama
Barack Obama: President Obama helps a boy shoot a basketball as part of the Easter Egg Roll activities at the White House in 2009.
Jim Young/Reuters
f61a3d7c-244c-44be-8f1b-88030cf094cd
Mitt Romney
Mitt Romney: Romney greets a young girl at a campaign stop in Davenport, Iowa, in January 2012.
Brian Snyder/Reuters
59e4308c-eb73-4aa8-91d4-bdb98d2732fa
Barack Obama
Barack Obama: Obama strains to lift William Yeung, 3, at a rally in Youngstown, Ohio, in February 2008.
David DeNoma/Reuters
c5836d65-71b2-4945-be10-85390e91394e
Mitt Romney
Mitt Romney: Romney's grandson Parker reaches up for a hug at a campaign stop in South Carolina in January 2008.
Jonathan Ernst/Reuters
a2fac51a-475f-4cad-b277-712737373a92
Barack Obama
Barack Obama: President Obama chats with Mason Wainwright, 1, and his mother in Boone, N.C., in October 2011.
Jason Reed/Reuters
78868a64-3750-4c6a-bea8-723ee515dcc1
Mitt Romney
Mitt Romney: Romney shakes hands with a young supporter during the opening of his campaign headquarters in Sioux City, Iowa, in November 2007.
Shannon Stapleton/Reuters
6b53b354-4be6-4b5d-a8c2-3196ff64fd46
Barack Obama
Barack Obama: Obama smiles with a baby girl in Columbia, S.C., on the day of that state's presidential primary, Jan. 26, 2008.
Jason Reed/Reuters
51998959-8764-478b-aa50-aa9df3613321
Mitt Romney
Mitt Romney: This boy is all smiles while posing with Romney at a campaign event in Carroll, Iowa, in December 2007.
Eric Thayer/Reuters
71a0b285-da3f-46fd-b19d-a99437d98368
Barack Obama
Barack Obama: Obama gazes with wide-eyed delight at this baby in Columbia, S.C., in January 2008.
Jonathan Ernst/Reuters
7a5b1acc-d275-4559-bed0-19de533eaeb0
Mitt Romney
Mitt Romney: Surrounded by a sea of reporters, Romney holds a young boy at a campaign stop in Greenville, S.C., in January 2012.
Jim Young/Reuters
cf019b83-ef61-4e74-85cd-516d26e47eef
Barack Obama
Barack Obama: President Obama greets a toddler at a barbecue restaurant in North Carolina in October of 2011.
Jason Reed/Reuters
8fb8dc7b-8fbc-49c4-a554-9d4e8391f58d
Mitt Romney
Mitt Romney: Romney plays airplane with his grandson, Parker, during a campaign stop in Clive, Iowa, in January 2008.