When North Dakota Gov. Kelly Armstrong took up an agency budget bill approved by the legislature, he vetoed a couple of line items. At least, that was his intention Monday. Instead, he accidentally vetoed $35 million for the state's housing budget. Now the state is figuring out how to deal with the unusual problem of a mistaken veto. "I have no recollection of anything like this happening in the 37 years I've been here," John Bjornson, legislative council director, said Thursday. "So, yeah, I'd say it's a little extraordinary."