CAIRO (AP) — The Trump administration’s out-the-door decision to designate Yemen’s Iranian-backed rebels as a terror organization sparked confusion in aid agencies and warnings from the United Nations and senior Republicans on Monday that it could have a devastating humanitarian impact on a conflict-wracked nation facing the risk of famine.The designation is to take effect on President Donald Trump’s last full day in office, a day before President-elect Joe Biden’s inauguration on Jan. 20. Several aid groups pleaded for Biden to immediately reverse the designation, with Oxfam America’s...…CAIRO (AP) — The Trump administration’s out-the-door decision to designate Yemen’s Iranian-backed rebels as a terror organization sparked confusion in aid agencies and warnings from the United Nations and senior Republicans on Monday that it could have a devastating humanitarian impact on a conflict-wracked nation facing the risk of famine.The designation is to take effect on President Donald Trump’s last full day in office, a day before President-elect Joe Biden’s inauguration on Jan. 20. Several aid groups pleaded for Biden to immediately reverse the designation, with Oxfam America’s...WW…