U.S. President Donald Trump and Colombian President Gustavo Petro held their first meeting at the White House. Observers see this as a critical test of whether the leaders can navigate their ideological differences.

WASHINGTON -- WASHINGTON (AP) — President Donald Trump is set to welcome Colombian President Gustavo Petro to the White House on Tuesday for talks only weeks after threatening military action against the South American country and accusing the leader of pumping cocaine into the United States.