Is this logic flawed? Obviously in swing races, vote how it’s needed, but if it’s probably going to be a landslide, why not vote for a third party? Some regions even allow for multiple party representation if enough people show interest, so it could be doing future good (if you think more parties is better representation)
Did we learn nothing from 2016? Until the Electoral College is replaced, third parties are nothing but spoilers for federal elections. No state can be truly taken for granted. See Georgia, etc. in 2020.