WILMINGTON, Del. (AP) — Joe Biden used his first national address as president-elect to vow to heal a deeply divided nation, declaring it was time to “let this grim era of demonization in America begin to end” and reaching out to the millions of people who voted against him to say, “Let’s give each other a chance.” His calls for reconciliation at a Saturday evening victory celebration came even as President Donald Trump continued to argue that the election had been stolen from him, an indication that the divisive politics that have gripped the U.S. over the past four years are far from over. It also suggested that even as Biden seeks to build out a government during his transition to the presidency, the president has little interest in helping him do so. Biden heads into his first full day as president-elect on Sunday with key staffing decisions to make as the coronavirus rages. The always-frenzied 10-week transition period before Inauguration Day on Jan. 20 already has been shortened by the extra time it took to determine the winner of Tuesday’s election.