Johnson, a former governor of New Mexico, ran for president before, so this isn't his first dip in the presidential pool.

In the 2012 election, he ran for the Republican nomination. After losing that to Mitt Romney, he ran as a candidate for the Libertarian Party. He ended up with just shy of 1 percent of the total electorate's votes.

This video includes images from Getty Images. 

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Waymo autonomous vehicles operate across 65 square miles inside I-285 and have been involved in six incidents with Atlanta Public School buses since May. Waymo issued a recall because of their cars briefly stopping or slowing down before continuing forward while a bus was stopped and flashing its lights. (Courtesy of Atlanta Public Schools)

Credit: Courtesy of Atlanta Public Schools