Union Minister Arun Jaitley has accused Congress leader Mallikarjun Kharge of using his dissent note on the new CBI Director's appointment as a political tool. <br />''  <br />'' Mr Jaitley said the right to dissent is sacrosanct and has to be used sparingly, but Mr Kharge has dissented a bit too frequently. <br />''  <br />'' In a Facebook post today, Mr Jaitley said using the instrument of dissent recklessly neutralises its value. <br />''   <br />'' Mallikarjun Kharge yesterday wrote to Prime Minister Narendra Modi giving his dissent on the appointment of new CBI Director Rishi Kumar Shukla. <br />''  <br />'' The Congress leader alleged that the officer did not have experience in handling anti-corruption cases and the criterion for selection was diluted in violation of law and Supreme Court judgments.<br />