Trump listened to the question, then said "Thank you very much". Welker asked, as the other reporters fell silent.
According to the report, the book said the couple sought to "control who could travel on trips funded by the State Department" and that Ivanka Trump frequently requested access to Air Force planes "when it was not appropriate".
Ivanka Trump was reported to want to establish a Trump dynasty to rival the Kennedy or Bush families and that includes becoming president herself.
Kushner now serves as a member of the White House team in charge of the Trump administration's Middle East peace plan that is expected to be rolled out shortly after Israel's national elections on April 9.
Cohn then instructed the aide to bring the letter to White House counsel Don McGahn, who freaked out when he learned the letter had been sent to the wrong printer.
Instead of firing Trump's daughter and son-in-law, the book, according to the Times, said Kelly and the President "agreed that they would make life hard enough to force the pair to offer their resignations, which the president would then accept".
The New York Times reported on the first shocking excerpt from the book, which claimed President Trump told his incoming White House chief of staff John Kelly in 2017 that his daughter and son-in-law were lacking in media savvy and that he wanted them to move away from Washington.
In response to the book, a representative for Kushner said "It seems [Ward] has written a book of fiction rather than any serious attempt to get the facts".
"Every point that Ms. Ward mentioned in what she called her "fact checking" stage was entirely false", the spokesman Peter Mirijanian said.
Ward interviewed over 220 people over a span of two years in her research for the book, which will be published next week.
He added: "Correcting everything wrong would take too long and be pointless".