WASHINGTON (Reuters) - Hackers are targeting state Democratic Party officials and have successfully breached and impersonated some of them, Politico reported, citing a message the Association of State Democratic Chairs sent Wednesday to its members. The email, titled “Security Alert: Please Do Not Search Wikileaks!,” warned recipients to avoid the anti-secrecy site — which has posted leaked material from the Democratic National Committee - because of concerns about malware embedded in the leaks, Politico said. 