In the Lake of the Woods 1996 on netflix

John Waylan is a candidate for U.S. senator; near the end of the campaign he is accused of ordering and participating in a massacre in a Vietnamese village. The accusation kills his career, and severely endangers his marriage. When he and Kathy flee to an isolated cabin, he awakes one morning to find her gone. Questions are asked, answers are given or hinted at, as the tension and suspense build.