Former vice president Chen Chien-jen was sworn in as Taiwan’s new prime minister on Tuesday to lead a newly formed Cabinet as the country’s ruling Democratic Progressive Party looks to regain ground following a setback in local elections in November. Former prime minister Su Tseng-chang on Monday led his Cabinet members to resign in a major reshuffle triggered by the DPP’s poor showing in the election. Chen, 71, was appointed by President Tsai Ing-wen on Friday to replace Su, 75, who had served as premier since January 2019. Chen said the priority for his new Cabinet was to adjust Covid restri…