Republicans have already gained as many as 60 seats in Congress, but when GOP gains are looked at on a state-by-state basis, the bloody picture for Democrats nationwide becomes even more gruesome. Several state legislatures made historic transitions to Republican hands — some for the first time since the 19th century — and nearly an entire generation of state Democrats saw its ranks obliterated. Here is POLITICO’s look at states that saw the political landscape change dramatically. • Alabama’s most monumental shift came in the state Legislature, in which Republicans gained control of both the House and the Senate for...