Democrats pressed the Treasury chief over whether other taxpayers affected by the leak that included Trump's tax returns would receive similar treatment.
The OBR said its UK growth forecast for last year had been 'too optimistic', with its prediction of 2 per cent being replaced with an initial estimate of just 1.4 per cent.
Chancellor Rachel Reeves' main hope for survival has been the fear that moving her on from the Treasury would cause ructions on the nervy gilts market.