It follows reports that President Trump was outraged by comments made by Mulvaney during the Ukraine corruption saga.
The allegations of abuse of power over the Ukraine incident led to impeachment proceedings against President Trump.
Mulvaney's departure has been on the cards for the last few weeks.
Mr Mulvaney is to become US special envoy to Northern Ireland, while North Carolina lawmaker Mark Meadows has been appointed to take over his former position.
US lets flights resume at El Paso airport after brief security halt
The US Federal Aviation Administration lifted emergency flight restrictions that had barred all flights to and from Texas' El Paso International Airport, which borders Mexico, after warning flights could be cancelled for 10 days, citing special security reasons.
Ten dead after shooter opens fire at high school in Canada
Ten people, including the shooter, are dead after an assailant opened fire at a high school in western Canada on Tuesday in one of the country's deadliest mass casualty events in recent history.
Tropical cyclone Gezani slams into Madagascar, killing nine
Tropical cyclone Gezani slammed into Madagascar's eastern coastline, killing nine people in the Indian Ocean island nation's second-largest city, as walls of wind and rain left a trail of devastation, authorities said on Wednesday.
Russian strike kills father and three children near Ukraine's Kharkiv
A Russian drone strike killed four people, including three small children and their father, in a town west of Ukraine's second-largest city of Kharkiv, Ukrainian officials said on Wednesday.
Cambodia says it has closed almost 200 scam centres in fraud crackdown
Cambodia has closed almost 200 scam centres in a crackdown on transnational fraud in recent weeks, with authorities providing rare access to one centre in a bid to show they are tackling the sophisticated operations.
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The Business Breakfast is the day’s must listen for the UAE’s business leaders, and those who aspire to be.
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Broadcasting every weekday, Georgia Tolley goes beyond the headlines to speak to government ministers, decision makers, analysts and local experts to find out how the news will impact those of us living in the UAE.
UAE President Sheikh Mohamed Bin Zayed Al Nahyan’s visit to the US to boost economic and technology ties including AI.
Apple Inc. shares fell Monday after a closely followed analyst warned that demand for the firm’s new iPhone 16 Pro model has been lower than expected. Is this a sign that the AI software just isn’t ready?
Does working from home kill productivity or can it benefit staff by giving them more flexibility and a better work/life balance?
Dubai’s current population is more than double compared to almost twenty years ago, which now stands at 3.7 million. Lots of families are also moving to the UAE now. So what does it mean for the property market?
Glory Ehirim Nkiruka is Noon’s first ever female delivery driver. In her first ever interview, she explained why she loves her job, despite the heat!
