• US Presidents Gerald Ford giving a press conference in Indianapolis on Oct. 16, 1974. Ford lost the 1976 election campaign to Jimmy Carter, a defeat that historians have attributed to his decision to pardon Nixon for his crimes barely a month after taking office. (Photo by STR/AFP via Getty Images)
  • President Jimmy Carter happily shakes hands with a crowd who showed up to meet him at the airport in South Bend, Indiana, on his arrival for 1977 Notre Dame graduation ceremonies. (Photo by Wally McNamee/CORBIS/Corbis via Getty Images)
  • Indiana, 1976, Ronald Reagan speaking to an audience during his campaign for President in 1976, against Vice-President Gerald Ford - Ford became the nominee and lost to Jimmy Carter. (Photo by Owen Franken/Getty Images)
  • American politician George HW Bush and Dan Quayle raise their hands on a podium during a campaign rally, Huntington, Indiana, August 18, 1988. Among those also on the podium are Bush's wife, Barbara Bush (left), and Marilyn Quayle (in checkered outfit). The event was the first stop after the Bush/Quayle ticket had been nominated at the 1988 Republican National Convention, one day earlier. (Photo by Ed Lallo/Getty Images)
  • US President Bill Clinton (R) greets the crowd after giving a speech at a groundbreaking ceremony May 14, 1994, for a Martin Luther King Jr. and Robert F. Kennedy statue at the Martin Luther King Jr. Memorial Park in Indianapolis. (Photo by J. DAVID AKE/AFP via Getty Images)