President Barack Obama greets Ramone Davis, a veteran who served tours in Afghanistan and Iraq and now works at Ford’s Michigan Assembly Plant where the President spoke in Wayne, Mich., Jan. 7, 2015. The President mentioned Ramone during his speech.

President Barack Obama greets Ramone Davis, a veteran who served tours in Afghanistan and Iraq and now works at Ford's Michigan Assembly Plant where the President spoke in Wayne, Mich., Jan. 7, 2015. The President mentioned Ramone during his speech.

President Barack Obama speaks with a family during a stop for lunch at Zingerman’s Delicatessen in Ann Arbor, Mich., April 2, 2014.

President Barack Obama speaks with a family during a stop for lunch at Zingerman's Delicatessen in Ann Arbor, Mich., April 2, 2014.

Audience members applaud during President Barack Obama’s remarks at the Daimler Detroit Diesel Facility in Redford, Mich., Dec. 10, 2012.

Audience members applaud during President Barack Obama's remarks at the Daimler Detroit Diesel Facility in Redford, Mich., Dec. 10, 2012.

President Barack Obama tours the Daimler Detroit Diesel Facility in Redford, Mich., Dec. 10, 2012.

President Barack Obama tours the Daimler Detroit Diesel Facility in Redford, Mich., Dec. 10, 2012.

April 18, 2012 "We were doing an event at the Henry Ford Museum in Dearborn, Mich. Before speaking, the President was looking at some of the automobiles and exhibits adjacent to the event, and before I knew what was happening he walked onto the famed Rosa Parks bus. He sat in one of the seats, looking out the window for only a few seconds."

April 18, 2012
"We were doing an event at the Henry Ford Museum in Dearborn, Mich. Before speaking, the President was looking at some of the automobiles and exhibits adjacent to the event, and before I knew what was happening he walked onto the famed Rosa Parks bus. He sat in one of the seats, looking out the window for only a few seconds."

President Barack Obama sits on the famed Rosa Parks bus at the Henry Ford Museum following an event in Dearborn, Mich., April 18, 2012.

President Barack Obama sits on the famed Rosa Parks bus at the Henry Ford Museum following an event in Dearborn, Mich., April 18, 2012.

President Barack Obama is seen through a window backstage at the General Motors Lake Orion Assembly Plant in Orion Township, Mich., Oct. 14, 2011.

President Barack Obama is seen through a window backstage at the General Motors Lake Orion Assembly Plant in Orion Township, Mich., Oct. 14, 2011.

President Barack Obama greets people on the tarmac after arriving at Detroit Wayne Metropolitan Airport in Romulus, Mich., Oct. 14, 2011.

President Barack Obama greets people on the tarmac after arriving at Detroit Wayne Metropolitan Airport in Romulus, Mich., Oct. 14, 2011.

President Barack Obama jogs from backstage before delivering remarks at Johnson Controls, Inc., in Holland, Mich., Aug. 11, 2011.

President Barack Obama jogs from backstage before delivering remarks at Johnson Controls, Inc., in Holland, Mich., Aug. 11, 2011.

President Barack Obama tours Johnson Controls Inc. with Elizabeth Rolinski, Vice President of Operations, in Holland, Mich., Aug. 11, 2011.

President Barack Obama tours Johnson Controls Inc. with Elizabeth Rolinski, Vice President of Operations, in Holland, Mich., Aug. 11, 2011.