MADISON, Wis. — National groups on both sides of the abortion fight on Wednesday pledged significant spending in the race for a pivotal seat on the Wisconsin Supreme Court, tossing the perennial battleground state into the spotlight of the searing debate over abortion access.The winner of the April 4 general election will determine majority control of the court, which is expected to rule on cases affecting abortion, gerrymandered legislative districts and voting rights heading into the 2024 presidential election. The …