Senate control could come down to races that barely looked competitive a year ago. Arit John, a USA TODAY senior politics correspondent, explains why Republicans are spending heavily in Texas, why Iowa has become a true toss-up and how tariffs, gas prices and affordability have transformed the map.Let us know what you think of this episode by sending an email to [email protected]. See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.