That's interesting. I did some digging and found it was back in 1968. Courts in New York and Hawaii ruled he wasn't eligible. The article says he still received 36,571 votes, but I don't know if they were write-in's or if he was on the ballot in at least one other state.
It's ironic, because Cleaver's party was named "Peace and Freedom". That same year in April, he led an ambush of Oakland police officers, and subsequently jumped bail and fled to Cuba.
A few years back, California refused to exclude someone from the ballot, even though they were clearly ineligible. I don't remember if it was due to age, or possibly even US citizenship. I think they said something to the effect of: "we aren't empowered to make that decision".
Heh. IIRC, Cleaver's name was excluded from the CA ballot on age ineligibility.
Two states (California and Utah) refused to list Cleaver on the ballot, although each state listed the Presidential Electors and candidates for Vice President (Terry in California and Gonzales in Utah).Here is another source ... www.peaceandfreedom.org - Presidential and Vice-presidential Candidates
That wiki article has a paragraph where Peace and Freedom was ALLOWED on the ballot, even though ineligible, because California doesn't follow its own rules.