U.S. President Donald Trump's administration on Wednesday ordered federal agencies to undertake more large-scale layoffs of workers, while the president let downsizing czar Elon Musk take a star role at his first cabinet meeting and discuss his ambitious budget-cutting targets.

A new memo instructed agencies to submit plans by March 13 for a "significant reduction" in staffing to a federal workforce already reeling from waves of layoffs and program cuts by Musk's so-called Department of Government Efficiency. It did not specify the number of new layoffs.

The memo represents a major escalation in Trump and Musk's campaign to slash the size of the U.S. government.