Minor party and/or independent candidates for Congress will appear on the ballot in 44 states this November. The states in which there will be no such candidates are Alabama, Georgia, Hawaii, Nebraska, South Dakota, and Washington.
In Hawaii, Nebraska, and South Dakota, there are ballot-qualified minor parties who could have run someone without a great deal of effort, but no one chose to run.
In Washington, the top-two primary system produced only Democrats and Republicans on the ballot for Congress. In Alabama and Georgia, the petition requirements are so severe that no one outside the two major parties ran.