When President Joe Biden announced former South Bend, Indiana Mayor Pete Buttigieg as his pick for Transportation Secretary, many scratched their heads. Why would he tap someone who oversaw a small budget, in a small town, in the midwest for such a roll? That puzzle is finally coming together. It turns out that Biden favors Buttigieg's transportation views, specifically the idea that America should move away from the gas tax and instead opt into a tax based on the number of miles a person travels. It would be a new way to provide cash for the Highway Trust Fund, which...