The co-chair of Hillary Clinton's transition team lamented in March that the re-election of Israeli Prime Minister Benjamin Netanyahu was "depressing."
Neera Tanden, who also leads the liberal-leaning Center for American Progress, complained to John Podesta, Clinton's campaign chair, about Israel on the day after Netanyahu's win.
"Israel is depressing," Tanden wrote. "It's a good lesson that the wing nuts are just ruthless in every country."
A congressional investigation concluded this summer that the State Department funneled taxpayer money to a group that tried to oust Netanyahu during his re-election campaign.
The Obama administration has long been accused of allowing relations between the U.S. and Israel to sour.
The exchange between Tanden and Podesta was exposed this week by WikiLeaks, which has published thousands of Podesta's emails in 21 batches since Oct. 7.