Hillary Clinton’s presidential campaign has left Virginia off its upcoming battleground-state television ad buy beginning next week — the second state to be dropped in recent weeks as Clinton holds a significant lead over Donald Trump nationally and in key states. The campaign’s new television ad buy, which begins next Tuesday, consists of Florida, Iowa, Nevada, New Hampshire, North Carolina, Ohio and Pennsylvania. The reservations, which could easily be amended in the future, run through Labor Day. The decision reflects increasing confidence among Democrats that Clinton will keep Virginia, a state that had been expected to be bitterly contested, in...