Here is the latest Iowa news from The Associated Press

MADISON, Wis. (AP) — A super PAC backing Wisconsin Governor Scott Walker’s run for the Republican presidential nomination has announced a $9.25 million ad buy for three early voting states, expanding on a $7 million television ad campaign starting in Iowa next week. The ad buy was announced Wednesday.

DES MOINES, Iowa (AP) — U.S. Senator Chuck Grassley says he wants an update on the investigation into a 2014 drowning of a handcuffed Iowa man who fell from a patrol boat in the Lake of the Ozarks. The Iowa senator says in a letter Wednesday to a special prosecutor in Missouri that he wants the current status of the investigation into Brandon Ellingson’s May 2014 death.

HULL, Iowa (AP) — Authorities say an 88-year-old resident has died after a pickup crashed through a wall into a nursing home in northwest Iowa. The Sioux County Sheriff’s Office says Anna Dykstra was pronounced dead Monday afternoon at Pleasant Acres Care Center in Hull. The pickup driver, 77-year-old Lawrence Sohl, was taken to a Sioux Center hospital for treatment. No other injuries have been reported.

DUBUQUE, Iowa (AP) — A pesky insect that slowly kills ash trees has been found in Dubuque and is expected to spread quickly through the city’s extensive ash tree population. The Telegraph Herald reports the emerald ash borer is a small, metallic-green beetle. Its larvae chew into the layer of wood under the bark, cutting off the flow of water and nutrients to an ash tree.