Biden signals sharp shift from Trump with Cabinet picks

In this 2014 file photo, Assistant Secretary of State for African Affairs Linda Thomas-Greenfield, right, testifies during a Senate Foreign Relations Committee hearing on Capitol Hill in Washington. President-elect Joe Biden is expected to tap Thomas-Greenfield as the U.S. ambassador to the United Nations. (AP Photo/Pablo Martinez Monsivais, File)

WASHINGTON — President-elect Joe Biden on Monday tapped Obama-era officials for top national security and economic roles, signaling a stark shift from the Trump administration’s “America First” policies that disparaged international alliances and favored deregulation and tax cuts.