I get the impression, that Joe doesn’t do many campaign appearances. Neither does Kamala. Is she not out campaigning so as not to upstage Joe?
I had never heard the term “lid day” until recently with Joe. Is this new terminology created just for the Biden campaign?
No, the word in this context is older than I am. It is a somewhat common Inside-The-Beltway saying. Was used on the annoyingly liberal show, “The West Wing.”
“PRESIDENT LEAVES SPOTLIGHT TO G.O.P.; Lid Is On at White House as the Convention Nears” 12 July 1964, The New Yo9rk Times https://www.nytimes.com/1964/07/12/archives/president-leaves-spotlight-to-gop-lid-is-on-at-white-house-as-the.html
Her own presidential campaign was an dismal failure.