"The Supreme Court agreed with the Secretary of State of Ohio that systems to safeguard the vote from fraud already exist and that checking voter registrations against databases never intended for that purpose would have the effect of flagging and making problems for voters who really shouldn't have any problems voting."
Actually, she might have needed to do a little better research. The Court made no such decision or agreement. What they ruled was that the GOP had no standing to file the suit causing the issue to be raised, and they tossed out the adverse ruling. The result is that the issue which Ms. Maddow cited is actually still legally undecided, but there is good news.
What the Supreme Court's ruling did say is that the manner in which states conduct their voter registration is not the business of the Republican Party, and that the GOP may not use the courts to interfere in that process. If you think about it, that's an even more broad victory for democracy. Rather than a ruling on one narrow issue, the Supreme Court told the GOP in a much more broad sense,
"Keep your filthy paws off of our democracy."