The US and UK economies are expected to grow more slowly in 2017 than previously predicted, the International Monetary Fund (IMF) said.
The UK would witness 1.7% growth in 2017 compared to the earlier 2% forecast.
The US growth forecast has also been reduced to 2.1% from 2.3%.
The global growth projections of 3.5% for 2017 remain the same.
Few days after US President Donald Trump appointed financier Anthony Scaramucci as communications chief, he deleted past tweets expressing opinions contrary to the government.
He wasn't secretive about it: "Full transparency: I'm deleting old tweets. Past views evolved & shouldn't be a distraction. I serve @POTUS agenda & that's all that matters," he posted.
Topics of difference include immigration, climate change and gun control.
Strong threats from China have led Vietnam to reportedly end a gas-drilling expedition in a disputed area of the South China Sea.
Spanish company Repsol, which was awarded a lease for drilling, was ordered by Vietnamese authorities to leave the area.
Last week, authorities reportedly told Repsol that China had threatened to attack Vietnamese bases in the Spratly islands if the drilling didn't stop.