WASHINGTON — Vice President Joe Biden reassured Iraq’s government Monday of U.S. support in the fight against the Islamic State, telephoning Prime Minister Haider al-Abadi with thanks for “the enormous sacrifice and bravery of Iraqi forces” one day after Defense Secretary Ash Carter questioned the Iraqi military commitment. Biden’s call followed harsh criticism from Iraqi and Iranian quarters after Carter questioned Iraqi forces’ “will to fight” the surging Islamic State. A White House statement Monday said the vice president welcomed an Iraqi decision to mobilize more troops and “prepare for counterattack operations.” Biden also pledged full U.S.