washington u.s. senate bank committee top democrat tussle treasury secretary steven mnuchin hear thursday flow information agency late ask president donald trump republican order restrain communications democrats aware white house guidance formal informal urge administration officials respond delay respond democratic senators senator sherrod brown liberal democrat ask mnuchin toward end hear mnuchin answer brown say early hear write mnuchin march ask potential conflict interest ownership administration receive response press mnuchin send committee complete list trump business associate financial tie mnuchin say hear check treasury staff fully respond inquiries committee ask brown send note remind deliver list senators begin question mnuchin two take argument off-line treasury email reporters brief statement say respond brown letter march 31. brown office circulate response receive generally discuss compliance conflict interest laws lack detail brown office say treasury brief letter answer question senator also seem reassure treasury drag feet communicate democrats ask possible guidance white house brown press commit respond ... members party committee timely manner request information mnuchin respond treasury spokesman replay question formal informal white house order communication democratic senator tussle u.s. treasury secretary communication