No state has axed its income tax on wages in 45 years. Now 2 Southern states are on a path to do so

About 45 years have passed since a U.S. state last eliminated its income tax on wages and salaries. But with recent actions in Mississippi and Kentucky, two states now are on a path to do so, if their economies keep growing. The push to zero out the income tax is perhaps the most aggressive example of a tax-cutting trend that swept across states as…