New Delhi [India], February 12 (ANI): Following the rising demand for a CBI enquiry into the Rajasthan Eligibility Examination for Teachers (REET) exam paper leak case, former Union minister and BJP leader Rajyavardhan Rathore on Saturday took to a "Gandhian method of protest" and sent a postcard to the Chief Minister Ashok Gehlot demanded a CBI probe into the case.