Sen. Heidi Heitkamp, D-S.D., is highlighting Republican attacks on Obamacare in her latest campaign ad to win re-election, but the video never mentions the Affordable Care Act by name.

Heitkamp’s campaign ad out Thursday centers on the healthcare law’s protections for people with pre-existing illnesses, such as cancer or diabetes, that the House voted to roll back in its healthcare bill last year and that the Trump administration is seeking to sever in court. Heitkamp faces a difficult re-election battle in North Dakota against the pro-Trump Republican Rep. Kevin Cramer.