U.S. President Joe Biden will tap former Chicago Mayor Rahm Emanuel, who served as White House chief of staff for former President Barack Obama, as his ambassador to Japan, a report said Tuesday.

The decision to nominate Emanuel, known more for his sharp tongue than his foreign policy chops, is expected to be formally announced later this month, the Financial Times reported, citing eight people familiar with White House discussions.

The Biden administration did not immediately respond to a request for confirmation.