Here is the latest Iowa news from The Associated Press

AKRON, Iowa (AP) — New Jersey Governor Chris Christie is back in Iowa spending time with political activists who could prove helpful if the Republican runs for president in 2016. Christie headlined Governor Terry Branstad’s birthday bash last night.

DES MOINES, Iowa (AP) — Four people — including a toddler — have been rescued from the roof of a submerged car that rolled into a Des Moines pond. The Des Moines Register reports that the crash happened around 2:30 p.m. Friday while the people were out sightseeing. Police are unsure whether the driver forgot to put the vehicle in park or had taken her foot off the brake pedal. Rescue workers found a middle-aged woman, two teenagers and a 2-year-old child standing on top of the sunken vehicle.

DUBUQUE, Iowa (AP) — Dubuque police and fire department officials say they are investigating two vehicle fires as arson. The Dubuque Telegraph Herald reports that the fires were reported before dawn Friday in a parking lot. Dubuque Fire Marshal Mark Burkle says investigators have sent samples from the vehicles to a crime lab in Ames.

IOWA CITY, Iowa (AP) — University of Iowa football player Reggie Spearman has been arrested on suspicion of drunken driving, leading coach Kirk Ferentz to announce a minimum one-game suspension for the linebacker. Iowa City police sayt the 19-year-old was arrested just after midnight Friday on suspicion of operating a vehicle while intoxicated. Spearman was booked into jail around 1:30 a.m. yesterday and later released.