Sounds like any citizen has all three:
Injury: A free and fair election is a right, and anything that interferes with it, such as a sham candidate, causes injury to every American with suffrage.
Causation: Obama’s running
Redressability: A court order to remove him from ballots and/or prevent his swearing-in as President.
In any election there is a high probability of “injury” - your candidate could lose. Of course, ineligible candidates injure “the system”, by diminishing the trust we have in the election system.