South Carolina exit polls: Climate change slips as top priority vs. Iowa, New Hampshire

• Iowa's top 5: Health care 37%, climate change 30%, economy 12%, foreign policy 8%, taxes 4%.
• New Hampshire's top 5: Health care 35%, climate change 33%, economy 11%, foreign policy 6%, immigration 4%.
• South Carolina's top 5: Health care 37%, economy 22%, climate change 14%, race relations 9%, gun policy 7%.

What's next: Polls close at 7 p.m. EST.