A sweeping 2021 law drew a legal complaint from the Justice Department. Legislators in the state are considering several new measures focused on ballot access and fraud investigations. ATLANTA — Butch Miller, a Republican leader of the Georgia State Senate, is running for lieutenant governor and faces a tough fight this spring against a primary opponent backed by former President Donald J. Trump. So perhaps it is no surprise that Mr. Miller, a co-sponsor of a sweeping and restrictive state voting law last year, has once again jumped into the fray, promoting a new measure to prohibit the use of...