Last year, proponents of limiting partisan politics in the creation of electoral districts needed to win over Justice Anthony Kennedy. They couldn't.
The issue is back before the Supreme Court again, with arguments on Tuesday, and it might be harder than ever to convince the justices to rein in the practice known as partisan gerrymandering, designing districts to benefit one political party.
A new round of redistricting awaits after the 2020 census, and the court's decision could help shape the makeup of Congress and state legislatures over the next 10 years.