Abortion has emerged as a defining fault line of this year’s elections, with consequential contests in several states Tuesday offering fresh tests of the issue’s political potency nearly 18 months after the Supreme Court ended a federal right to an abortion. The decision overturning Roe v. Wade scrambled American politics in 2022, transforming a long-standing social conflict into an electoral battering ram that helped drive Democrats to critical victories in the midterm races. Now, as abortion r