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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Thousands of "No Kings" protesters marched down Courtland Street from the Atlanta Civic Center to Liberty Plaza on Saturday. (Abbey Cutrer/AJC)

Credit: Abbey Cutrer