President Erdogan remains deeply frustrated at Saudi Arabia's response to the murder of the journalist Jamal Khashoggi in the country's consulate in Istanbul. "Unless the perpetrators are found out, the whole world and the Islamic community shall not be satisfied".
Many US senators have said they believed otherwise.
"They are a relationship that has mattered for 70 years across Republican and Democrat administrations alike", said Pompeo, who previously served as the Central Intelligence Agency director.
Earlier this month, the United States imposed its own sanctions on Saudi officials for the same reason.
Three of them, Canadian Prime Minister Justin Trudeau, British Prime Minister Theresa May and French President Emmanuel Macron, said publicly they had pressed Prince Mohammed for a full investigation into the murder.
The messages shared by Abdulaziz, which include voice recordings, photos and videos, paint a picture of a man deeply troubled by what he regarded as the petulance of the Crown Prince.
Pompeo is a former director of the Central Intelligence Agency, which has reportedly concluded that Prince Mohammed ordered the murder.
"In any case, our relationship is with the Kingdom of Saudi Arabia", Trump wrote. "We are all very much hoping that there will be de-escalation and a release of those prisoners".
The newspaper says bin Salman sent at least 11 messages to his closest adviser, Saud al-Qahtani.
The Tory leader is concerned about the worsening situation, where a Saudi-led war has put millions on the brink of starvation.
The assessment also details communication between the crown prince and his associates in August 2017 about how to trap Khashoggi.
The Crown Prince also told associates in August a year ago that if he failed to persuade Khashoggi to return to Saudi Arabia, "we could possibly lure him outside Saudi Arabia and make arrangements" - a communication the Central Intelligence Agency said "seems to foreshadow the Saudi operation launched against Khashoggi".
In his first column for the newspaper, Khashoggi said he feared being arrested in an apparent crackdown on dissent overseen by the prince since.
May's spokesperson confirmed the meeting with bin Salman, who has been accused of allegedly ordering the killing of Khashoggi, will be conveyed Friday evening.