No, ineligible candidates should not appear on the ballot.
If we had any mechanism to ensure that was the case the Kenyanesian Usurpation would not have happened.
‘No, ineligible candidates should not appear on the ballot.’
completely irrelevant answer, as Cruz was clearly on the ballot, and secured numerous primary delegates; your imaginary ‘mechanisms’ to stop what you believe to be ineligible candidates do not exist; this being the case, I ask again, do you throw your ethical positions under the bus because of a technical nicety you wished were in effect but clearly is not...?