The US president has fired acting attorney general Sally Yates after she questioned the legality of Donald Trump’s travel ban. Yates’ dismissal came hours after she instructed Justice Department lawyers not to defend Trump's controversial decree banning people from several Muslim-majority countries. International and domestic anger over Trump’s immigration ban have been boiling ever since. The state of Washington is planning to challenge the president in Federal Court over his executive order. The brash billionaire’s directive has also drawn legal challenges. A group of Muslim leaders have filed a federal lawsuit against Trump’s decree.