This case is the biggest threat to free and fair elections in a long time. If SCOTUS rules in favor of ISL theory, state legislatures would control everything, including the appointment of presidential electors – a process central to Trump’s unsuccessful plan to overturn the 2020 results. There’s still hope, though, because even prominent conservatives have argued against granting state lawmakers this type of power. SCOTUS should rule to maintain the status quo.
As stated in the Constitution, management of elections should fall to the people who regularly have to face the electorate, not some court that can’t be held accountable. Despite the opposition's concern, the ISL theory doesn’t give state lawmakers unfettered power over elections because Congress can keep them in check. This case will test whether SCOTUS is willing to live up to the Constitution's promise.