The Supreme Court could reshape U.S. elections for years to come as it hears a number of cases with implications for the country's political landscape. In perhaps the most high-stakes example, the country is waiting to see whether the justices weaken a section of the Voting Rights Act. Other rulings expected this year could alter how much political parties can spend in coordination with candidates, or affect the deadline for casting ballots on time. Here are some of the key cases to watch.