Which Republican candidate looks the most presidential?

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Newt in Kingsport, Tenn.
Republican presidential candidate, former House Speaker Newt Gingrich arrives for a campaign stop at Food City, Monday, March 5, 2012, in Kingsport, Tenn. (AP Photo/Evan Vucci)
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Romney after the kiss
Ann Romney, wife of Republican presidential candidate, former Massachusetts Gov. Mitt Romney, wipes lipstick off his face after kissing him at a campaign rally in Zanesville, Ohio, Monday, March 5, 2012. (AP Photo/Gerald Herbert)
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Trace Nystrom, 6, of Knoxville, sits on his father's shoulders and prays during the invocation before Republican presidential candidate, former Massachusetts Gov. Mitt Romney speaks at a campaign rally at West Hills Elementary School in Knoxville, Tenn., Sunday, March 4, 2012. (AP Photo/Gerald Herbert)
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Gingrich in Chattanooga
Republican presidential candidate, former House Speaker Newt Gingrich pauses during a campaign stop at Food City on Monday, March 5, 2012, in Chattanooga, Tenn. (AP Photo/Evan Vucci)
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Gingrich and Cain on stage together
Republican presidential candidate, former House Speaker Newt Gingrich laughs as former presidential candidate Herman Cain, speaks during a campaign stop at Food City on Monday, March 5, 2012, in Chattanooga, Tenn. (AP Photo/Evan Vucci)
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Gingrich in Kingsport, Tenn.
Republican presidential candidate, former House Speaker Newt Gingrich shakes hands during a campaign stop at Food City on Monday, March 5, 2012 in Kingsport, Tenn. (AP Photo/Evan Vucci)
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Paul in Idaho
Republican presidential candidate Rep. Ron Paul, R-Texas, speaks at a campaign event at the Bonner County Fairgrounds, Monday, March 5, 2012, in Sandpoint, Idaho. (AP Photo/Matt Mills McKnight)
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Fairbanks rally for Paul
Supporters applaud Republican presidential candidate Rep. Ron Paul, R-Texas, during a rally Sunday, March 4, 2012, in Fairbanks, Alaska. (AP Photo/Sam Harrel)
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President Obama supporters at Romney town hall meeting
Supporters of President Barack Obama hold signs and cheer outside a location where Republican presidential candidate, former Massachusetts Gov. Mitt Romney was to hold a town hall meeting, Monday, March 5, 2012, in Youngstown, Ohio. (AP Photo/Gerald Herbert)
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Paul at Quest Aircraft
Republican presidential candidate Rep. Ron Paul, R-Texas, tours the manufacturing facility at Quest Aircraft Company, Monday, March 5, 2012 in Sandpoint, Idaho. (AP Photo/Matt Mills McKnight)
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Gingrich works the crowd
Republican presidential candidate, former House Speaker Newt Gingrich shakes hands during a campaign stop at Food City, Monday, March 5, 2012, in Kingsport, Tenn. (AP Photo/Evan Vucci)
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Santorum at the American Legion
Republican presidential candidate, former Pennsylvania Sen. Rick Santorum and his wife Karen, right, visit with attendees at the American Legion, Monday, March 5, 2012, in Westerville, Ohio. (AP Photo/Eric Gay)
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Santorum in Ohio
Republican presidential candidate, former Pennsylvania Sen. Rick Santorum visits with students at the Dayton Christian School, Monday, March 5, 2012, in Miamisburg, Ohio. (AP Photo/Eric Gay)
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Santorum speaks befoe the American Israel Public Affairs Committee
Republican presidential candidate, former Pennsylvania Sen. Rick Santorum speaks befoe the American Israel Public Affairs Committee (AIPAC), in Washington, Tuesday, March 6, 2012. (AP Photo/Charles Dharapak)
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Paul supporter in Idaho
Dominic Brauer of Sandpoint, Idaho, holds a sign outside the Bonner County Fairgrounds before a town hall meeting with Republican presidential candidate Rep. Ron Paul, R-Texas, Monday, March 5, 2012, in Sandpoint. (AP Photo/Matt Mills McKnight)
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Romney greets supporters at a campaign rally at Gregory Industries
Republican presidential candidate, former Massachusetts Gov. Mitt Romney, and his wife Ann, greet supporters at a campaign rally at Gregory Industries in Canton, Ohio, Monday, March 5, 2012. (AP Photo/Gerald Herbert)
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Romney greets supporters at a campaign rally at Gregory Industries
Republican presidential candidate, former Massachusetts Gov. Mitt Romney greets supporters at a campaign rally at Gregory Industries in Canton, Ohio, Monday, March 5, 2012. (AP Photo/Gerald Herbert)
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Romney, hugs his wife Ann as they speak at a campaign rally in Zanesville, Ohio
Republican presidential candidate, former Massachusetts Gov. Mitt Romney, hugs his wife Ann as they speak at a campaign rally in Zanesville, Ohio, Monday, March 5, 2012. (AP Photo/Gerald Herbert)
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Romney supporters in Tenn.
Supporters wait for Republican presidential candidate, former Massachusetts Gov. Mitt Romney to speak at a campaign rally at West Hills Elementary School in Knoxville, Tenn., Sunday, March 4, 2012. (AP Photo/Gerald Herbert)
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Paul stands in front of an Alaskan flag
Republican presidential candidate Rep. Ron Paul, R-Texas, stands in front of an Alaskan flag as he listens to a question during a rally Sunday, March 4, 2012, in Fairbanks, Alaska. (AP Photo/Sam Harrel)
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Santorum and his wife in Oklahoma City
Republican presidential candidate, former Pennsylvania Sen. Rick Santorum, left, is hugged by his wife, Karen, right, after speaking at a rally in Oklahoma City, Sunday, March 4, 2012. (AP Photo/Sue Ogrocki)
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Paul Supporters in Fairbanks, Alaska
Justin Harvey and his wife, Tanis, listen to Republican presidential candidate Rep. Ron Paul, R-Texas, as their niece Charity, 5, naps during a rally Sunday, March 4, 2012, in Fairbanks, Alaska. (AP Photo/Sam Harrel)

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Which candidate looks more presidential?

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