By Will WeissertThe Associated PressWASHINGTON — Joe Biden is promising to shift production of medical equipment and other key pandemic-fighting products “back to U.S. soil,” creating jobs and bolstering a domestic supply chain he says has been exposed as inadequate and vulnerable by the coronavirus outbreak. The presumptive Democratic presidential nominee’s campaign released a plan Tuesday to reinforce stockpiles of a “range of critical products on which the U.S.