Aaron Klein confirmed as head of Likud bid for March election; ruling party says US-born adviser 'one of the most talented strategists we ever worked with'

Appointment raises eyebrows, as far-right author and radio talk show host has a history of attacking Democratic US presidents and presidential hopefuls

The legal scholar's identity gives rise to vaguely, and sometimes explicitly, anti-Semitic chatter from right-wing figures once on the fringe but now increasingly in the mainstream

Immigration hard-liner, who is Jewish, recommended that then-Breitbart reporter Katie McHugh read the racist novel 'The Camp of the Saints'

US president's son cites an article from far-right outlet Breitbart, violating the strict conventions in place to protect officials who reveal wrongdoing in government

Orthodox Jewish journalist Joel Pollak says he was told he'd been disruptive at past events; campaign officials say Breitbart walks line between news and hate speech