DOINA CHIACU U.S. President-elect Joe Biden will announce the first of his Cabinet appointments on Tuesday and is planning for a scaled-down inauguration due to the coronavirus pandemic, aides have said, as he lays the foundation for his new administration despite President Donald Trump's refusal to concede. Since Biden, a Democrat, was declared the winner of the November 3 election two weeks ago, the Republican president has launched a barrage of lawsuits and mounted a pressure campaign to prevent state officials from certifying their vote totals, suffering another emphatic legal setback on Saturday in Pennsylvania. Ron Klain, Biden's choice as…