Would Minnesota Gov. Mark Dayton really scrap nearly $1 billion of infrastructure and other projects of public benefit to Minnesotans across the state? It seems doubtful the governor would really go as far as vetoing the bonding bill, which is the main focus of legislative sessions held during even-numbered years like this one. But that’s precisely what Dayton threatened to do Monday over, of all things, a state law requiring sprinkler systems in new homes 4,500 square feet or larger. Lawmakers want to overturn the state requirement. Dayton wants it left on the books.