Arizona ballot-placed Republican Presidential Candidate, whose direct and current competition for votes evidenced by thousands of dollars in Arizona-specific campaign expenses, lack Article III standing if a lower court determines that he is not "genuinely" competing based on hearsay in unverified news reports?

Did the lower court abuse its discretion in denying Plaintiffs motion to amend his complaint to ensure all facts were properly before the court?

Does an Arizona ballot-placed Republican Presidential Candidate lack Article III standing if a lower court determines he is not 'genuinely' competing based on hearsay in unverified news reports?