Israeli Ambassador to the United States Ron Dermer wrote a speech that then-presidential candidate Donald Trump delivered at the American-Israel Political Action Committee in 2016, a new book claims.

In Born Trump, which launches on Tuesday, journalist Emily Jane Fox claims that Dermer essentially dictated the speech to Trump’s son-in-law, Jared Kushner.

The speech was unusual in that Trump read it off a teleprompter, rather than extemporizing as he did in most public appearances.

According to Fox, before the event Dermer held an hour-long phone conversation with Kushner about the United Nations’s position on Israel, Iran and other issues important to Israel and to the audience, who were expected to be paying close attention to the speech.

Fox writes that for Kushner, who at the time was trying to put together an overall Middle East policy for the Trump campaign, the conversation with Dermer “was like getting your hands on the answer key the night before the final exam.”