There is a bill before Congress to make it mandatory for a Breathalizer interlock device be installed on First time DWI offenders. I think it is a good idea, and am behind it 100%, on a state by state basis. I don't think the Federal Government should get involved.
My virtual adopted son Eric (Neighbor's son) got a DWI, back in August. Judge sentenced him to 1 year walking, or 6 months walking and a interlock device installed on his car. He got his car back this month, with the interlock. This has really caused this young man to take a serious look at his behavior. A good thing. With the success we have here in Alaska, I think other states should get on board.