Photos: Campaigns we can believe in Ahead of his campaign announcement, Rand Paul's camp released his 2016 slogan: "Defeat the Washington machine. Unleash the American dream." Hide Caption 1 of 51

Photos: Campaigns we can believe in Paul supporters are handed placards reading "I Stand with Rand" while waiting in line for a book signing with the senator at the Conservative Political Action Conference. Hide Caption 2 of 51

Photos: Campaigns we can believe in Supporters of former Secretary of State Hillary Clinton stand near a Ready for Hillary bus after Clinton spoke about her book "Hard Choices." The "Ready for Hillary" slogan quickly became popular through the Ready for Hillary Super PAC, urging Clinton to run for president. Hide Caption 3 of 51

Photos: Campaigns we can believe in An iPhone with an "I'm Ready for Hillary" background is shown off at the Ready For Hillary Super PAC offices in Alexandria, Virginia. Hide Caption 4 of 51

Photos: Campaigns we can believe in Supporters cheer and wave "Forward" signs as President Barack Obama speaks at a rally on September 2, 2012, in Boulder, Colorado. Hide Caption 5 of 51

Photos: Campaigns we can believe in People cheer as Obama speaks on stage as he accepts the nomination for president on September 6, 2012, in Charlotte, North Carolina. After his successful "Hope and Change" 2008 campaign, Obama ran for reelection on the slogan "Forward." Hide Caption 6 of 51

Photos: Campaigns we can believe in People cheer as Republican presidential candidate Mitt Romney speaks at a town hall meeting in Grand Junction, Colorado, on July 10, 2012. Supporters hold up "Colorado Believes" signs, based on Romney's "Believe in America" campaign slogan. Hide Caption 7 of 51

Photos: Campaigns we can believe in Excited supporters cheer and hold up "Believe in America" signs as Romney arrives for a campaign stop in Rockford, Illinois, on March 18, 2012. Hide Caption 8 of 51

Photos: Campaigns we can believe in "Yes We Can" and "Change" were two of the most popular Obama campaign slogans in 2008. Hide Caption 9 of 51

Photos: Campaigns we can believe in Obama's camp also used "Change We Can Believe In" during the 2008 campaign. Hide Caption 10 of 51

Photos: Campaigns we can believe in A child holds up a "Country First" sign while waiting for vice presidential candidate Alaska Gov. Sarah Palin and presidential nominee Sen. John McCain at a rally of supporters on September 18, 2008, in Cedar Rapids, Iowa. Hide Caption 11 of 51

Photos: Campaigns we can believe in John Kerry signs "The Real Deal" campaign posters for supporters after a rally on April 27, 2004, in Youngstown, Ohio. Hide Caption 12 of 51

Photos: Campaigns we can believe in President George W. Bush waves from the stage during a bill-signing ceremony for the No Child Left Behind Act during a visit to Hamilton High School in Hamilton, Ohio, on January 8, 2002. "Leave No Child Behind" was a popular slogan during Bush's presidential campaign. Hide Caption 13 of 51

Photos: Campaigns we can believe in Bush ran as a "compassionate conservative," which became a popular slogan during his campaign. Hide Caption 14 of 51

Photos: Campaigns we can believe in Hispanic supporters of Bush cheer and hold up a sign that reads "A New Day" in Spanish, after the Texas governor won the Republican Party's unofficial "straw poll" on August 14, 1999, in Ames, Iowa. Hide Caption 15 of 51

Photos: Campaigns we can believe in In 2000, Ralph Nader ran on: "Government Of, By, and For the People ... Not the Monied Interests." Hide Caption 16 of 51

Photos: Campaigns we can believe in 1996 Republican presidential candidate Bob Dole's campaign slogan was "The Better Man for a Better America." Hide Caption 17 of 51

Photos: Campaigns we can believe in President George H.W. Bush and first lady Barbara Bush wave to supporters on October 12, 1992, at a campaign rally in Springfield, Pennsylvania. Buttons and posters that read "Stand by the President" and "Let's Stand by our Desert Storm Commander-in-Chief" were popular during his re-election campaign. Hide Caption 18 of 51

Photos: Campaigns we can believe in A badge for the 1992 presidential election features Democratic candidates Bill Clinton and Al Gore with the slogan "Hope not fear." Hide Caption 19 of 51

Photos: Campaigns we can believe in In 1992, Clinton ran on the slogan "Putting People First." Hide Caption 20 of 51

Photos: Campaigns we can believe in Behind Ronald Reagan are campaign posters with one of his most famous slogans: "Let's make America great again." Hide Caption 21 of 51

Photos: Campaigns we can believe in Reagan smiles as he speaks about his presidential campaign in 1979 front of a large banner with his campaign slogan, "The Time is Now." Hide Caption 22 of 51

Photos: Campaigns we can believe in President Gerald Ford and first lady Betty Ford sit in the back seat of a car in 1975. Ford's 1976 campaign slogan was, "He's Making us Proud Again." Hide Caption 23 of 51

Photos: Campaigns we can believe in Jimmy Carter looks up while shoveling peanuts on a peanut farm sometime in the 1970s. Carter was a peanut farmer, and "Not Just Peanuts" was one of his campaign slogans during the 1976 presidential election. Hide Caption 24 of 51

Photos: Campaigns we can believe in Two supporters of Richard Nixon attend the Republican National Convention on August 9, 1968, in Miami Beach, Florida, where Nixon was nominated Republican presidential candidate. His campaign slogan was, "Nixon's the One." Hide Caption 25 of 51

Photos: Campaigns we can believe in Sen. Robert Kennedy, Lady Bird Johnson and President Lyndon Johnson attend an election rally on November 3, 1964, at Madison Square Garden in New York. Johnson's slogan was, "The Stakes are Too High for You to Stay at Home." Hide Caption 26 of 51

Photos: Campaigns we can believe in Two "Goldwater girls" in July 1964 in Sherman Oaks, California, campaign for Barry Goldwater, the Republican candidate for president. Goldwater's campaign slogan was, "In Your Heart You Know He's Right." Hide Caption 27 of 51

Photos: Campaigns we can believe in Nixon's campaign slogan was "For the Future." He waves to the crowds with his wife, Pat, as he leaves the Hotel Commodore in New York on September 30, 1960. Hide Caption 28 of 51

Photos: Campaigns we can believe in Supporters could sport this 1952 campaign button for Dwight D. Eisenhower, the Republican candidate for president in the election. Hide Caption 29 of 51

Photos: Campaigns we can believe in President Harry S Truman smiles and waves to the excited Kansas City crowd after hearing the news that he had won the election to retain the presidency in 1948. Truman famously adopted the slogan "Give 'em Hell, Harry!" after a supporter yelled the phrase during a campaign event. Hide Caption 30 of 51

Photos: Campaigns we can believe in Truman holds a flag bearing the Seal of the United States, circa 1945. Truman used the slogan, "I'm just wild about Harry." Hide Caption 31 of 51

Photos: Campaigns we can believe in President Franklin D. Roosevelt and his colleagues pose aboard "The Roosevelt Special" campaign train on September 14, 1932. When Roosevelt ran for president eight years later, he used the slogan, "Better a third-termer than a third-rater." Hide Caption 32 of 51

Photos: Campaigns we can believe in Roosevelt chats to two Georgia farmers in 1932, the first year he was elected president. During his first campaign for the presidency, he used the slogan, "Happy days are here again." Hide Caption 33 of 51

Photos: Campaigns we can believe in Herbert Hoover listens to a one-valve radio set circa 1928. Hoover's campaign slogan in 1928 was, "A chicken in every pot and a car in every garage." Hide Caption 34 of 51

Photos: Campaigns we can believe in Calvin Coolidge inspects a campaign truck painted with images of Coolidge and his running mate, Coolidge's birthplace in Plymouth, Vermont, and the campaign slogan, "Two common sense Americans," circa 1929. Hide Caption 35 of 51

Photos: Campaigns we can believe in Coolidge mows his father's farm in Plymouth, Vermont, circa 1920. Coolidge used the slogan "Keep cool with Coolidge" in 1924. Hide Caption 36 of 51

Photos: Campaigns we can believe in Warren G. Harding and first lady Florence Harding leave the U.S. Army Port of Debarkation at Hoboken, New Jersey, on May 23, 1921. Harding used the campaign slogan "A return to normalcy" in 1920. Hide Caption 37 of 51

Photos: Campaigns we can believe in Harding dresses as a cowboy for a presidential party in the West in July 1923. Harding also used the slogan "Cox and cocktails," a jab at his anti-Prohibition opponent, in 1920. Hide Caption 38 of 51

Photos: Campaigns we can believe in A campaign poster supporting the re-election of President Theodore Roosevelt stresses his policies of sound money, expansion, protection and prosperity. Roosevelt, who assumed the presidency when President William McKinley was assassinated in 1901, used the slogan, "Stand pat!" Hide Caption 39 of 51

Photos: Campaigns we can believe in "Patriotism, Protection, and Prosperity" was McKinley's slogan in 1896. He served as the 25th president until his assassination in 1901, six months into his second term. Hide Caption 40 of 51

Photos: Campaigns we can believe in "Rejuvenated Republicanism" was Benjamin Harrison's slogan in 1888. He served as the 24th president of the United States, defeating incumbent President Grover Cleveland. Hide Caption 41 of 51

Photos: Campaigns we can believe in "Blaine, Blaine, James G. Blaine, The Continental Liar from the State of Maine," was Grover Cleveland's slogan in 1884. He served as both the 22nd and 24th president of the United States. Hide Caption 42 of 51

Photos: Campaigns we can believe in "54-40 or Fight" was James K. Polk's slogan in 1844 — a reference to the territory expansion the U.S. hoped to make. The northern border of the Oregon was located at the 54 degrees, 40 minutes line of latitude. Hide Caption 43 of 51

Photos: Campaigns we can believe in "Ma, Ma, Where's my Pa, Gone to the White House, Ha, Ha, Ha," was James Blaine's slogan in 1884. He lost the presidential election to Grover Cleveland, who served as the 22nd and 24th President of the United States. Hide Caption 44 of 51

Photos: Campaigns we can believe in "Don't Swap Horses in the Middle of the Stream" was President Abraham Lincoln's slogan in 1864. Hide Caption 45 of 51

Photos: Campaigns we can believe in "Vote Yourself a Farm" was Lincoln's slogan in 1860. Hide Caption 46 of 51

Photos: Campaigns we can believe in "Free Soil, Free Labor, Free Speech, Free Men, and Fremont" was John C. Fremont's slogan in 1856. Hide Caption 47 of 51

Photos: Campaigns we can believe in "For President of the People" was Zachary Taylor's slogan in 1848. Hide Caption 48 of 51

Photos: Campaigns we can believe in "Who is James K. Polk?" was Henry Clay's slogan in 1844. Hide Caption 49 of 51

Photos: Campaigns we can believe in "Reannexation of Texas and Reoccupation of Oregon" was Polk's slogan in 1844. Hide Caption 50 of 51