BUENOS AIRES—Argentina’s interior minister, Eduardo “Wado” de Pedro, offered his resignation on Wednesday, the first high profile casualty from the government following a bruising election loss for the ruling party in midterm primaries on Sunday. De Pedro was one of the top officials allied with the more radical “Kirchnerist” wing of the center-left government of Alberto Fernández, who faces a battle to win back moderate voters ahead of a midterm ballot in November. In a letter President Fernandez circulated by the ministry, de Pedro said he was offering his resignation to help the government move forward toward the full midterm ballot in November and regain voter support. “Listening to your words on Sunday night where you raised the need to interpret the verdict expressed by the Argentine people, I have considered the best way to help this task is by putting my resignation at your disposal,” he wrote. The resignation …