The "experts on both sides" are blatantly lying, you go figure the reasons. Sometimes it is literally pride, where these idiots refuse to admit there might be a problem.
A thorough comb through voter roles in states shows how much of a problem it is.
Look at what they found in the state that elected the half-there festerman to the US senate- over 150,000 invalid registrations, and they have to publish the roles for a few years. How many of them voted in the last few elections?
Again in PA, the USPS finally released, a YEAR after the finding, that, yeah, a truck delivered sealed mail-in ballots, tens of thousands of them, to two locations in PA, delivered from Bethpage NY. All new NY residents voting where they used to live, right? NO, because there was zero paperwork for the mass delivery, AND they still cannot find the trailer. "At this point what difference does it make?!?" Shrillary Clinton.
Voter fraud is a HUGE problem, and it blantantly ignored by almost all election officials, you go figure the reasons. There is a current verification system, ERIC, that is anything but. Red states are dropping ERIC because they are only a facade of verification, leaving thousands of invalid names on the roles.
As far as the OP, every state has their own laws regarding ballot initiatives. CA does what it pleases when it ignores ballot initiatives. The gist of the article is that the feds have to "get in there" and enforce one size fits all laws which is unconstitutional. Whenever folks are talking "Democracy! Democracy!" you should be looking for where your rights are being eroded, because they are, no matter how much melanin in your skin.