President Donald Trump raised eyebrows when he invited Democratic Sen. Heidi Heitkamp to fly with him aboard Air Force One for a tax-reform rally in her home state of North Dakota earlier this year. For a vulnerable Democrat running for re-election in a deep-red state that Trump won by 36 points, appearing with the president was a political gift. Trump called Heitkamp up on stage, shook her hand and heaped praise on her, describing her as a “good woman” — the perfect visuals for campaign ads portraying her as a moderate willing to defy the “Resistance” and work with the president.