POLITICS, not proof of wrongdoing, is driving the investigations into Sen. Loren Legarda and her son, Batangas 1st District Rep. Leandro Legarda Leviste, according to the senator’s spokesman.Lawyer Tony La Viña said a review of the allegations and records showed no illegal or improper act by either Legarda or Leviste, arguing that legitimate private business activities had been recast as criminal conduct.“After intensive review, I am convinced…