The Census Bureau became a permanent agency within the Department of Commerce and Labor following passage of An Act to Provide for a Permanent Census Office in 1902. In 1913, in became part of the Department of Commerce upon its separate establishment.
Trump has the authority as Secretary of Commerce is an agency under his span of control
Therefore he has the authority NOT Congress
Nice try
The Census Office only carries out the directives of the Congress.
In fact the 1902 Act clearly states exactly what information the Office could collect for that particular census.
Congress never gave up their authority.