U.S. President Barack Obama enjoys a shave ice at Island Snow in Kailua, Hawaii January 1, 2015. The President and his family are currently on their annual Christmas and New Year's holiday season vacation. REUTERS/Gary Cameron (UNITED STATES - Tags: POLITICS SOCIETY FOOD) 

U.S. President Barack Obama waves to people while enjoying a shave ice at Island Snow in Kailua, Hawaii January 1, 2015. The people around the President are unidentifed. The President and his family are currently on their annual Christmas and New Year's holiday season vacation. REUTERS/Gary Cameron (UNITED STATES - Tags: POLITICS FOOD SOCIETY TPX IMAGES OF THE DAY) 

U.S. President Barack Obama arrives for lunch with Connecticut Governor Dannel Malloy (D-CT) (R) and other officials at the Cafe Beauregard restaurant in New Britain, Connecticut March 5, 2014. The White House said Obama chose to eat at the restaurant to highlight the fact that they pay their employees above the minimum wage. REUTERS/Jonathan Ernst (UNITED STATES - Tags: POLITICS BUSINESS EMPLOYMENT) 

U.S. President Barack Obama orders lunch at Nancy's restaurant at Oak Bluffs at Martha's Vineyard, August 13, 2013. REUTERS/Larry Downing (UNITED STATES - Tags: POLITICS) 

U.S. President Barack Obama and Israeli Prime Minister Benjamin Netanyahu eat Matzo bread delivered to them by miniature robots as they tour a technology expo at the Israel Museum in Jerusalem March 21, 2013. REUTERS/Jason Reed (JERUSALEM - Tags: POLITICS FOOD SCIENCE TECHNOLOGY) 

U.S. President Barack Obama shares his strawberry pie with a boy during a lunch stop at the Kozy Corners restaurant in Oak Harbor, Ohio, in this July 5, 2012 White House handout photograph obtained on March 14, 2013. Math enthusiasts celebrate March 14 nationwide as Pi day. Pi is the mathematical constant approximately equal to 3.14. Picture taken July 5, 2012. REUTERS/Pete Souza/White House/Handout (UNITED STATES - Tags: POLITICS SOCIETY TPX IMAGES OF THE DAY) ATTENTION EDITORS - THIS IMAGE WAS PROVIDED BY A THIRD PARTY. FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS. THIS PICTURE IS DISTRIBUTED EXACTLY AS RECEIVED BY REUTERS, AS A SERVICE TO CLIENTS 

U.S. President Barack Obama bites into a bratwurst after a visit to Usinger's Fine Sausage in Milwaukee, Wisconsin September 22, 2012.
REUTERS/Kevin Lamarque (UNITED STATES - Tags: POLITICS ELECTIONS USA PRESIDENTIAL ELECTION) 

U.S. President Barack Obama bites into a bratwurst during a visit to Usinger's Fine Sausage in Milwaukee, Wisconsin September 22, 2012.
REUTERS/Kevin Lamarque (UNITED STATES - Tags: POLITICS ELECTIONS TPX IMAGES OF THE DAY USA PRESIDENTIAL ELECTION) 

U.S. President Barack Obama waves after a visit to Usinger's Sausage in Milwaukee, Wisconsin September 22, 2012.
REUTERS/Kevin Lamarque (UNITED STATES - Tags: POLITICS ELECTIONS USA PRESIDENTIAL ELECTION) 

U.S. President Barack Obama eats a French fry as he holds a round table discussion with first time voters at OMG Burger in Miami, Florida September 20, 2012. REUTERS/Kevin Lamarque (UNITED STATES - Tags: POLITICS ELECTIONS) 

U.S. President Barack Obama (R) prepares to eat an ice treat after being served by owner Steve Holt at Tropical Sno in Denison, Iowa, while touring the state in a bus, August 13, 2012. REUTERS/Larry Downing (UNITED STATES - Tags: POLITICS FOOD) 

U.S. President Barack Obama enjoys a beer with Jennifer Klanac (L) and Suzanne Woods (R) at Ziggy's Pub in Amherst, Ohio July 5, 2012. Obama is on a two-day campaign bus tour of Ohio and Pennsylvania.

REUTERS/Kevin Lamarque (UNITED STATES - Tags: POLITICS SOCIETY TPX IMAGES OF THE DAY) 

U.S. President Barack Obama has a burger at the Kozy Corners restaurant in Oak Harbor, Ohio July 5, 2012. Obama is on a two-day campaign bus tour of Ohio and Pennsylvania.
REUTERS/Kevin Lamarque (UNITED STATES - Tags: POLITICS ELECTIONS FOOD) 

U.S. President Barack Obama eats ribs during a lunchtime visit to Kenny's BBQ in Washington June 13, 2012. REUTERS/Kevin Lamarque (UNITED STATES - Tags: POLITICS SOCIETY) 

U.S. President Barack Obama and British Prime Minister David Cameron each eat hot dogs at a first round "First Four" game of the NCAA Division I Men's Basketball Tournament between Mississippi Valley State and Western Kentucky at the University of Dayton Arena in Ohio, March 13, 2012. REUTERS/Larry Downing (UNITED STATES - Tags: POLITICS SPORT BASKETBALL) 

U.S. President Barack Obama carries takeout Chinese food from the Great Eastern Chinese restaurant in San Francisco February 16, 2012. Obama is attending several fundraisers on the West Coast on Thursday. REUTERS/Jason Reed (UNITED STATES - Tags: POLITICS) 

U.S. President Barack Obama eats eggs during breakfast with five small business owners at Rausch's Cafe in Guttenberg, Iowa, August 16, 2011. Obama is on a mid-west bus trip through Minnesota, Iowa and Illinois. REUTERS/Jason Reed (UNITED STATES - Tags: POLITICS ELECTIONS BUSINESS IMAGES OF THE DAY) 

U.S. President Barack Obama tosses a bag of popcorn to members of the media in LeClaire, Iowa, August 16, 2011. Obama is on a three-day mid-west bus tour through Minnesota, Iowa and Illinois, aiming to leave behind doubts about his leadership that could dent his 2012 re-election prospects. REUTERS/Jason Reed (UNITED STATES - Tags: POLITICS ELECTIONS IMAGES OF THE DAY) 

U.S. President Barack Obama orders a hamburger and fries at the Good Stuff Eatery on Capitol Hill in Washington, August 3, 2011. Obama ate lunch at the restaurant with members of his staff who, for the past months have been working at resolving the debt ceiling issue. REUTERS/Jason Reed (UNITED STATES - Tags: POLITICS FOOD) 

U.S. President Barack Obama enjoys a water ice from John's in Philadelphia, Pennsylvania June 30, 2011. Obama is in Philadelphia for several fund raising events.

REUTERS/Kevin Lamarque (UNITED STATES - Tags: POLITICS) 

U.S. President Barack Obama drinks from a pint of Guinness stout at the Ollie Hayes pub in Moneygall, Ireland May 23, 2011. Obama sipped a pint of stout and cuddled babies on Monday as a tiny Irish village on Monday welcomed home "a long lost cousin" with an outpouring of affection. Hoisting a glass of Guinness at Ollie Hayes pub as fiddle music played, Obama thus began a four-nation tour of Europe with a celebration of his ancestral roots. REUTERS/Maxwell's/POOL (IRELAND - Tags: POLITICS) 

U.S. President Barack Obama and his daughter Malia (2nd L) eat "shave ice" with family friends outside of Island Snow while they are on Christmas vacation in Kailua, Hawaii December 27, 2010. REUTERS/Hugh Gentry (UNITED STATES - Tags: POLITICS SOCIETY) 

U.S. President Barack Obama and his daughters Malia and Sasha (L) order "shave ice" with family friends at Island Snow while they are on Christmas vacation in Kailua, Hawaii December 27, 2010. REUTERS/Hugh Gentry (UNITED STATES - Tags: POLITICS) 

U.S. President Barack Obama (C) eats ice cream as he visits the Great Buddha statue in Kamakura, on the sidelines of the APEC summit, November 14, 2010. REUTERS/Jim Young (JAPAN - Tags: POLITICS ODDLY IMAGES OF THE DAY) 

U.S. President Barack Obama, accompanied by U.S. Senate candidate Alexi Giannoulias (L), orders breakfast in Valois restaurant in Chicago, October 31, 2010. REUTERS/Larry Downing (UNITED STATES - Tags: POLITICS) 

U.S. President Barack Obama and Washington State Democratic Senator Patty Murray stop at a donut shop in Seattle, Washington October 21, 2010. Obama is on a four-day, five-state swing to support Democrats in the upcoming election. REUTERS/Kevin Lamarque (UNITED STATES - Tags: POLITICS FOOD IMAGES OF THE DAY SOCIETY ENTERTAINMENT) 

U.S. President Barack Obama eats a locally-caught shrimp with David Camardelles (R) and convenience store owner Patti Gaspard during a meeting with locals in Grand Isle, Louisiana, June 4, 2010. Obama travelled to the Louisiana gulf coast to further assess damage from the BP Deepwater Horizon oil spill. REUTERS/Jason Reed (UNITED STATES - Tags: POLITICS) 

U.S. President Barack Obama buys a sandwich before he hosts a round table discussion with small business leaders at the Grand Central Bakery in Seattle, Washington, August 17, 2010. The president is on the second day of a five-state trip across America. REUTERS/Larry Downing (UNITED STATES - Tags: POLITICS FOOD BUSINESS) 

U.S. President Barack Obama eats mint chocolate chip ice cream at Brusters Ice Cream shop in Panama City Beach, Florida, August 15, 2010. REUTERS/Jason Reed (UNITED STATES - Tags: POLITICS) 

Russia's President Dmitry Medvedev (L) and U.S. President Barack Obama have burgers for lunch at Ray's Hell Burger restaurant in Arlington, Virginia June 24, 2010. REUTERS/Kevin Lamarque (UNITED STATES - Tags: POLITICS) FOR BEST QUALITY AVAILABLE: ALSO SEE GM1E66S1OO001 

US Democratic presidential candidate Senator Barack Obama (D-IL) (L) prepares to eat as he visits the Dooky Chase restaurant in New Orleans February 7, 2008. REUTERS/Carlos Barria (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008 (USA) 

US Democratic presidential nominee Senator Barack Obama (D-IL) eats an ice cream cone during a campaign stop at Windmill Ice Cream Shop in Aliquippa, Pennsylvania, August 29, 2008. REUTERS/Jim Young (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008 (USA) 

U.S. Presidential candidate Barack Obama (D-IL) selects a pastry during an impromptu stop at the 'Cafe on the Corner' in Dover, New Hampshire, January 4, 2008. Obama, campaigning for the January 8 New Hampshire Primary, won the Iowa Caucus January 3. REUTERS/Jason Reed (UNITED STATES) 

US Democratic presidential candidate Senator Barack Obama (D-IL) sips his drink as speaks to a group of woman during a round table discussion in Charleston, South Carolina January 25, 2008. REUTERS/Joshua Lott (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008 (USA) 

U.S. President Barack Obama, sitting next to 5-year-old Nick Aiello (L), sips his beverage while attending the Washington Wizards NBA basketball game against the Chicago Bulls in Washington February 27, 2009. REUTERS/Molly Riley (UNITED STATES) 

U.S. Democratic presidential candidate Senator Barack Obama (D-IL) eats breakfast with union workers at the Evansville Labor Temple, a venue for several workers unions, in Evansville, Indiana, May 5, 2008. The Indiana Presidential Primary will be held on May 6. REUTERS/Jason Reed (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008 (USA) 

U.S. President Barack Obama (L) eats popcorn as first lady Michelle Obama (R) cheers as they attend the George Washington University versus Oregon State University (OSU) basketball game in Washington November 28, 2009. Michelle's brother, Craig Robinson,(not in picture) is the OSU head coach and Michelle's mother, Marian (C) also attended. REUTERS/Mike Theiler (UNITED STATES SPORT POLITICS IMAGES OF THE DAY) 

U.S. Democratic presidential candidate Senator Barack Obama (D-IL) eats an omelette breakfast alongside other diners at the Four Seasons family restaurant in Greenwood, Indiana May 6, 2008. Indiana and North Carolina will hold presidential primaries on Tuesday. REUTERS/Jason Reed (UNITED STATES) US PRESIDENTIAL ELECTION CAMPAIGN 2008 (USA) 

Democratic presidential candidate Senator Barack Obama (D-IL) eats pork chop with his family during a campaign stop at the Iowa State Fair in Des Moines, Iowa, August 16, 2007. Obama defended his foreign policy credentials on Thursday, saying Sen. Hillary Clinton and other rivals were trying to pass off entrenched Washington ways as experience. REUTERS/Joshua Lott (UNITED STATES) 

U.S. President-elect Barack Obama (R) has lunch with Washington Mayor Adrian Fenty at Ben's Chili Bowl Restaurant in Washington January 10, 2009. REUTERS/Jim Young (UNITED STATES) 

U.S. President Barack Obama is served fried chicken as he visits Mrs. Wilkes' Dining Room in Savannah, Georgia March 2, 2010. REUTERS/Larry Downing (UNITED STATES - Tags: POLITICS FOOD) 

U.S. President Barack Obama eats a snack in his limousine after he steps off Air Force One as he arrives in Dresden June 4, 2009. Obama on Friday will visit Dresden and a former Nazi concentration camp at Buchenwald. REUTERS/Fabrizio Bensch (GERMANY POLITICS)