The Treasury secretary was due to appear alongside Federal Reserve Chair Jerome Powell to discuss the massive CARES Act stimulus package approved in late March.
France, Britain, Italy and Spain have already sent a reply expressing their desire to agree on "a fair digital tax at the level of the OECD as quickly as possible," Le Maire said.
They are looking in particular at why a red zone was not enforced in February around the towns of Nembro and Alzano, with regional officials and the government blaming each other.