Final projection: GOP +24 in House, Senate control, gubernatorial gain

— Our final Senate pick is 51-49 Republican, or a net Republican gain of 1 seat.

— Our final House pick is 237-198 Republican, or a net Republican gain of 24 seats.

— Our projected gubernatorial picture is 29-21 Republican, or a net Republican gain of 1 governorship.

— Read on for details — and caveats.