Donald Trump has consistently refused to release his tax returns to the public.
White House Press Secretary Sarah Huckabee Sanders wouldn’t tell a young letter writer named Dylan how much the president is worth.
It was the second request for Trump's returns by Senate Democrats in as many weeks, part of a Democratic campaign to pressure Republicans in Congress into obtaining the documents.
The Democratic efforts face long odds in the Republican-controlled Congress. Three attempts in the House have met with defeat this year.
Defying decades of precedent, Trump has long refused to release the documents.
Such a change would not have kept Trump out of the White House.