Joe Biden on Saturday reached the two-week mark since becoming president-elect, with President Donald Trump stinging from back-to-back setbacks in his desperate, unprecedented bid to undo his election defeat.

Biden, a Democrat, is preparing to take office on Jan 20, but Trump, a Republican, has refused to concede and is seeking to invalidate or overturn the results through lawsuits and recounts in a number of states, claiming - without proof - widespread voter fraud...