The death of Supreme Court Justice Ruth Bader Ginsburg, and President Donald Trump’s pledge to nominate a replacement as early as this week, thrusts the constitutional challenge to the Affordable Care Act back into the spotlight less than two months before the election, giving Democrats a chance to highlight a key issue that had largely receded into the background as voters focused on COVID-19, the economy, racial justice and other concerns. Ginsburg’s death Friday evening leaves a vacancy on the...