President Barack Obama delivers remarks on immigration at the Copernicus Community Center in Chicago, Ill., Nov. 25, 2014.

President Barack Obama delivers remarks on immigration at the Copernicus Community Center in Chicago, Ill., Nov. 25, 2014.

President Barack Obama signs a wall backstage before delivering remarks on immigration at the Copernicus Community Center in Chicago, Ill. Nov. 25, 2014.

President Barack Obama signs a wall backstage before delivering remarks on immigration at the Copernicus Community Center in Chicago, Ill.  Nov. 25, 2014.

President Barack Obama is greeted by Illinois Governor Pat Quinn and Chicago Mayor Rahm Emanuel upon arrival at Chicago O’Hare International Airport, Nov. 25, 2014.

President Barack Obama is greeted by Illinois Governor Pat Quinn and Chicago Mayor Rahm Emanuel upon arrival at Chicago O'Hare International Airport, Nov. 25, 2014.

First Lady Michelle Obama views a display of her dresses in the East Colonnade of the White House during the Fashion Education Workshop, Oct. 8, 2014.

First Lady Michelle Obama views a display of her dresses in the East Colonnade of the White House during the Fashion Education Workshop, Oct. 8, 2014.

President Barack Obama talks with Chicago Mayor Rahm Emanuel after they disembark Marine One in Chicago, Ill., May 22, 2014.

President Barack Obama talks with Chicago Mayor Rahm Emanuel after they disembark Marine One in Chicago, Ill., May 22, 2014.

President Barack Obama greets a child in the crowd at Chicago O’Hare International Airport in Chicago, Illinois, May 22, 2014.

President Barack Obama greets a child in the crowd at Chicago O'Hare International Airport in Chicago, Illinois, May 22, 2014.

A U.S. Marine salutes the arrival of President Barack Obama aboard Marine One at O’Hare International Airport in Chicago, Ill., April 2, 2014.

A U.S. Marine salutes the arrival of President Barack Obama aboard Marine One at O'Hare International Airport in Chicago, Ill., April 2, 2014.

May 29, 2013 "A woman hugs the President as he and Chicago Mayor Rahm Emanuel greeted people on the tarmac at O’Hare International Airport in Chicago." (Official White House Photo by Pete Souza) This official White House photograph is being made available only for publication by news organizations and/or for personal use printing by the subject(s) of the photograph. The photograph may not be manipulated in any way and may not be used in commercial or political materials, advertisements, emails, products, promotions that in any way suggests approval or endorsement of the President, the First Family, or the White House.

May 29, 2013
"A woman hugs the President as he and Chicago Mayor Rahm Emanuel greeted people on the tarmac at O'Hare International Airport in Chicago." 
(Official White House Photo by Pete Souza)

This official White House photograph is being made available only for publication by news organizations and/or for personal use printing by the subject(s) of the photograph. The photograph may not be manipulated in any way and may not be used in commercial or political materials, advertisements, emails, products, promotions that in any way suggests approval or endorsement of the President, the First Family, or the White House.

President Barack Obama and Chicago Mayor Rahm Emanuel greet people on the tarmac at Chicago O’Hare International Airport in Chicago, Ill., May 29, 2013.

President Barack Obama and Chicago Mayor Rahm Emanuel greet people on the tarmac at Chicago O'Hare International Airport in Chicago, Ill., May 29, 2013.

First Lady Michelle Obama listens to students and counselors during a discussion on youth violence at William R. Harper High School in Chicago, Ill., April 10, 2013.

First Lady Michelle Obama listens to students and counselors during a discussion on youth violence at William R. Harper High School in Chicago, Ill., April 10, 2013.