So only McCain during the election has standing according to you? No American has the right to have the law as set out in the Constitution enforced?
Not only to me but to the judiciary as well. There have been several cases which established that the losing candidate has standing to sue if his opponent is found to be ineligible. Recent decisions have tightened this up somewhat to include only legitimate candidates with a reasonable expectation of winning - fringe candidates aren't included.
No American has the right to have the law as set out in the Constitution enforced?
We're talking about a civil suit. The requirement to establish standing has existed for centuries.