"Democratic" means anyone caucusing with the Democrats, and thus includes Bernie Sanders and Angus King. "By 7/7" means by 11:59pm PT on 7/6. By "step aside", I mean "not seek the presidential nomination of the Democratic party".

If Biden steps aside by 7/7, then this question will resolve to the number of people who will have called for Biden to step aside by the time that he steps aside.

I'm not sure how to make "call on Biden to resign" unambiguous, but:

• It should be unconditional. A statement like "If Biden is unable to do X, he should step aside" doesn't count.

• I can answer questions in the comments (though don't promise to do so quickly.)

• Ultimately I'll be making the judgment call.