Presidential candidates (from left) Gary Johnson of the Libertarian Party, Jill Stein of the Green Party, Virgil Goode of the Constitution Party, and Rocky Anderson of the Justice Party will participate in a debate Tuesday put on by Free & Equal. (Free & Equal)

Presidential candidates (from left) Gary Johnson of the Libertarian Party, Jill Stein of the Green Party, Virgil Goode of the Constitution Party, and Rocky Anderson of the Justice Party will participate in a debate Tuesday put on by Free & Equal. (Free & Equal)