Missouri is holding a special election on June 4 to fill the vacant U.S. House seat, 8th district. On February 9, the Republican Party and also the Libertarian Party held nominating conventions to choose their nominees. See this story about the Republican convention and this story about the Libertarian convention. The Libertarian Party chose Bill Slantz and the Republican Party chose Jason Smith. Democrats haven’t chosen their nominee yet. It is not known if the Constitution Party, which is also ballot-qualified, plans to nominate anyone.