For decades, Republicans have railed every four years against the Supreme Court and its perceived liberal activism to spur conservatives to elect presidents who will appoint like-minded justices. Now strategists in both parties are suggesting this could be the Democrats’ year to make the court a foil to mobilize voters.

The prospect arises both because of President Obama’s comments this week implicitly warning the court against striking down his signature domestic achievement, the expanded health insurance law, and because of recent court rulings, chiefly the Citizens United campaign finance decision, and looming cases on immigration and affirmative action that incite passions on the left.