Comments to my earlier diary on an Election Rights Constitutional Amendment have made a solid point that what I had suggested was too elaborate for an Amendment, and that the Constitution has to be concise and broad with the details left for statutory reform. So I've pared it down to the absolute essentials, and this is what I think needs to be added to the Constitution.
1. The right to vote shall not be infringed, nor shall government on any level involved in the electoral process fail to facilitate the equal, free, fair, accurate, thorough, and timely exercise of that right by all practical means.
2. The federal government shall establish standards for all elections in order to comply with the above mandate and has the authority to enforce those standards.
3. The federal government has the power to regulate the financing of political campaigns and related advertising in order to enforce compliance with the above mandates, but for no other purpose.
4. The federal government shall establish federal criminal penalties for the deliberate infringement of or failure by public officials to adequately facilitate the right to equal, free, fair, accurate, thorough, and timely exercise of voting in order to unfairly advantage or disadvantage a particular candidate, group of candidates, voter, group of voters, or ballot measure.
I'm not a lawyer, so I'm sure real-world Constitutional language would be somewhat different, but this is the gist of what is needed - regardless of its prospects for passage. More practical Amendments designed to secure passage through self-interested states not wanting to cede power to the federal government would obviously by considerably different.