Since the hacking of the Democratic National Committee, there has been growing concern about cyber-manipulation of election results this November. Voter registration databases in Illinois and Arizona were penetrated in June, and the FBI reported this week on attempts against…

Homeland Security Secretary Jeh Johnson tells MSNBC's "Morning Joe" on Friday that "exactly who did it" remains under investigation. Last month, the FBI warned state elections officials to boost their election security after hackers targeted data systems in at least…