The place to keep a close eye on in Idaho is Ada County, home to Boise, the state's capital and its largest city. It's provided about half the vote in Idaho so far. Ada gave Clinton 40 percent of her statewide vote total in the 2016 general election. At the moment, Biden only leads in Ada by 45 percent to 43 percent over Sanders with about one-third of precincts reporting, but Biden leads statewide 46 percent to 39 percent.