President Trump rightly flagged the peril in Rep. Max Miller's reelection bid after credible allegations of assault against his ex-wife and young daughter emerged. These charges threaten to hand Democrats a potent weapon in Ohio and erode the party's claim to defend family and order. Voters expect Republican leaders to embody the accountability they preach, not drag scandals into the midterms. The Constitution presumes representatives of sound character to safeguard liberty under law. Domestic violence strikes at the most basic individual right to security within the home, a principle the Founders rooted in natural law rather than fleeting political convenience. Miller's troubles illustrate why limited government works only when those wielding power first govern themselves. Republicans who tolerate such stains invite their own irrelevance.