Now that's an interesting argument! An argument based on the 14th Amendment would be novel. The 14th has been used to justify a lot of things not envisioned by the author of the amendment -- one man/one vote and abortion for example -- but an argument for fraud vitiating a presidential election could be made using the 14th as its basis. I would be interested in seeing how the Court would view that.
Yeah, You can’t have one man one vote apply in one situation and then not when it comes to voting fraud
Even if different issues, by the constitution they need to be consistent
Wasn’t the 14th amendment the winning argument in Bush v Gore? They argued that different counties using differing standards and only limited recounts was a 14th amendment violation, since the votes of some people were being treated differently than those of others.