article_snippet: 'Obama could revoke such an executive agreement with the stroke of a pen,' the Republicans wrote, 'and future Congresses could modify the terms of such an executive agreement with the stroke of a pen at any time.'
highlights_snippet: Obama's successor 'could revoke such an executive agreement with the stroke of a pen,' an open letter to Iran's mullahs read .
  
highlights_snippet: 'Future Congresses could modify the terms of such an executive agreement with the stroke of a pen at any time'
  Republicans' judgement 'seems to be clouded by Republicans' abhorrence of Obama,' the Senate's highest ranking Democrat accused .