A major business group on Monday cast doubt on New York City’s newly announced COVID-19 vaccine mandate for private workers, noting that a similar measure attempted by President Joe Biden’s administration was blocked by a federal court. “Inconsistent policies at the federal, state, and city levels are not helpful and it is unclear who will enforce a mayoral mandate, and whether it is even legal,” Kathryn Wylde, head of the Partnership for New York City, told news outlets in a statement. “President Biden’s vaccine mandate on employers with over 100 employees is currently held up by litigation and it is hard to imagine that the mayor can do what the president is being challenged to accomplish,” she added. Earlier Monday, New York City Mayor Bill de Blasio said private workers must get vaccinated by Dec. 27 or face termination. He said a major impetus behind the move is the Omicron variant …