“The Hill”, one of two publications geared for members of Congress and their staffs, has this article about minor party and independent candidates for the U.S. Senate this year. The article could have mentioned other states, beyond the states it does cover. The only states in which there will be no minor party or independent candidates on the ballot for U.S. Senate this year (in the states that have Senate elections) are Alabama, Idaho, Maine, Massachusetts, New Hampshire, New Mexico, and Rhode Island. In Alabama, only one candidate for U.S. Senate is on the ballot.
The title of the article is flawed, but the text of the article is better than one would expect from the title.