Doubt we'll ever see an execution for treason. I only say that because we seem to have neutered ourselves as a country by only seeking the death penalty for murders of a heinous nature.
Treason prosecutions have essentially disappeared. Although treason was never a popular charge for federal prosecutors, treason prosecutions attended nearly every armed conflict in American history up to and including the Second World War. Since 1954, however, only one person has been charged with treason against the United States. And that single instance was relatively unusual: in 2006, a federal grand jury indicted Adam Gadahn for treason based on his participation in several al-Qaeda propaganda videos. Gadahn was not in custody at the time of his indictment, and he was later killed in a 2015 drone strike in Pakistan before he could stand trial in the United States.
Doubt we'll ever see an execution for treason. I only say that because we seem to have neutered ourselves as a country by only seeking the death penalty for murders of a heinous nature.
This ^
https://constitutioncenter.org/the-constitution/articles/article-iii/clauses/39#does-the-treason-clause-still-matter