Red-state Democrats are embracing one of Obamacare’s most popular provisions to help them win re-election in November.

Democratic Sens. Joe Manchin of West Virginia and Heidi Heitkamp of North Dakota unveiled ads this week slamming GOP opponents for trying to gut Obamacare’s protections for people with pre-existing illnesses, such as diabetes or cancer. Sen. Joe Donnelly, D-Ind., did the same in a Twitter video.

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