David Montgomery gives Vikings’ defense fits

Bears running back David Montgomery drags Vikings rookie cornerback Jeff Gladney (20) and safety Harrison Smith (22) into the end zone for a 14-yard touchdown run that gave the Bears a 27-17 lead in the third quarter Sunday at U.S. Bank Stadium.Running back David Montgomery as a perfect fit for Matt Nagy’s offense looked like just another miscalculation symptomatic of a wayward offense that had sent the Bears’ season drifting into oblivion.

But not anymore. With a revamped offensive line and a re-tooled offensive scheme, Montgomery suddenly has become the productive, efficient running back the Bears’ envisioned when they traded up 14 spots to get him in the third round of the 2019 draft.

For…