On June 13, U.S. Senator Bernie Sanders, the independent from Vermont, filed a petition to to run for re-election as an independent candidate. He also filed a petition to be in the Democratic primary for the same office. However, in the past, he has filed to run as a Democrat, and then he always wins the Democratic primary, and then withdraws his Democratic Party nomination. It is expected he will do the same thing this year.
Assuming Sanders is re-elected as an independent, it is somewhat likely two independent candidates will win U.S. Senate seats this year. The other likely independent winner is Angus King, running in Maine.