Campaign slogans: Why do some work and others don't?

Published 1655 GMT (0055 HKT) February 13, 2016

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A Ronald Reagan campaign button shows his 1980 slogan, "Let's Make America Great Again." MPI/Getty Images

For his 2016 campaign, Donald Trump's slogan is "Make America Great Again," an echo of Reagan's. Here a supporter wears the slogan on a button. Victor J. Blue/Bloomberg/Getty Images

Hillary Clinton has used the slogan, "Hillary for America" and also had supporters display posters saying "Fighting for us." A member of the audience holds a campaign sign at the top of a set of bleachers as Clinton speaks in Iowa on January 30. Andrew Harnik/AP

Campaign buttons for Democratic presidential candidate Bernie Sanders highlight his "Feel the Bern" slogan. Alex Wong/Getty Images

"I Like Ike" decal from the 1952 presidential campaign, showing a close-up portrait of Dwight D. Eisenhower, the popular World War II general who went on to serve two terms as president. Transcendental Graphics/Archive Photos/Getty Images

Republican presidential candidate Sen. Marco Rubio signs autographs under his "A New American Century" slogan at a campaign rally February 5. Chip Somodevilla/Getty Images

Republican presidential candidate and former Florida Gov. Jeb Bush speaks to supporters during a rally on his "Jeb Can Fix It" tour on November 2, 2015. Brian Blanco/Getty Images

President Harry Truman's 1948 election campaign made the expression "Give em hell, Harry!" famous. MPI/Getty Images