Voter disenfranchisement has been part of the playbook for a long time now.
Take this issue for example - if this passes, and a teacher gets a felony from suggesting a book off of the pre approved list, they probably can't vote anymore.
Less than half is not "most". 1.4 million felons were covered by the Amendment the voters approved to restore felon voting rights, but as your link states a few months later the legislature passed a law to limit that which made 775000 of those felons no longer eligible.