The White House has announced new policies to loosen COVID-19 vaccine mandates that had previously drawn concern from defense contractors facing reluctant workforces and lawmakers who said they were worried about the Pentagon’s industrial base. The new policies released by the Labor Department , which will be enforced starting Jan. 4, delay the Dec. 8 deadline for all federal contractors to be fully vaccinated. The policies would allow businesses with more than 100 workers to use testing and masking in...