BOISE — U.S. Sen. Michael Crapo will likely be required to install an ignition interlock device in his car to test his breath for alcohol as a result of his drunken driving arrest in Virginia. But that wouldn't have been the case in his home state of Idaho, which doesn't require the devices for first-time offenders.

The Spokesman-Review reports that 17 states, including Washington and Virginia, require the in-car breath tests to prevent even first-time convicted drunken drivers from starting their cars while under the influence. Idaho requires the devices for repeat offenders, however.

Crapo was arrested on suspicion of drunken driving last week, and police have said the Idaho Republican registered a blood-alcohol level of 0.11 percent when he was pulled over in Alexandria, Va., after running a red light.

Crapo, a first-time offender who was known as a teetotaler due to his Mormon faith, has said he doesn't plan to contest the charges. His court date is Friday. Virginia law likely will require him to get an interlock device to drive, which prevents a vehicle from starting if the driver's breath reveals the presence of alcohol.

A growing number of groups are saying that Idaho also should require the ignition interlock devices for first-time drunken driving offenders. Last month, the National Transportation Safety Board sent a letter calling for states to require the devices for a first offense. Idaho Transportation Department spokesman Reed Hollinshead said the letter is under review.

AAA of Idaho and Mothers Against Drunk Driving of Idaho are also asking for tougher ignition interlock laws.