President Donald Trump on Friday called for the firing of the head of the agency that produces the monthly jobs figures after a report showed hiring slowed in July and was much weaker in May and June than previously reported.

Trump in a post on his social media platform alleged that the figures were manipulated for political reasons and said that Erika McEntarfer, the director of the Bureau of Labor Statistics, who was appointed by former President Joe Biden, should be fired.

Trump focused much of his ire on the revisions the agency made to previous hiring data. Job gains in May were revised down to just 19,000 from 125,000, and in June they were cut to 14,000 from 147,000. In July, only 73,000 positions were added. The unemployment rate ticked up to a still-low 4.2% from 4.1%.

While the jobs numbers are often the subject of political spin, economists and Wall Street investors — with millions of dollars at stake — have always accepted U.S. government economic data as free from political manipulation.