National elections can't be fixed right now precisely because control is distributed.
The only reason to consolidate them under federal control is so the feds can fix them.
Even though elections are run state by state, it is still illegal for non-citizens to vote, so states can be held accountable, and maybe even election results not accepted from some states, if illegals are known to be voting there.
It will be interesting. I remember in the 2012 election there were dozens and dozens of articles on FR documenting egregrious fraud.
Oximoron, never work.