Contributions from GCC nations, especially Saudi Arabia, to the Clinton Foundation total in the millions.
At the very least, the Arab and Muslim leadership must insist on some sort of reconciliatory sound bite from President Trump while he is in the kingdom.
Trump's first global foray provides the challenge of illustrating U.S. leadership even as much of his foreign policy team has yet to be named and the administration works out its positions on key issues from a strategy against Islamic State to whether to remain in the Paris climate agreement.
Trump has been a staunch opponent of the Iran nuclear deal as it was negotiated under his predecessor, President Barack Obama, despite the Republican Party's opposition.
The Trump visit to the kingdom will be underscoring both the success of the Saudi outreach to the new administration and the determination of the President to recommit to the Saudi-led regional alliance.
While in Saudi Arabia, the president will also have coffee with King Salman, attend a royal banquet and hold bilateral meetings with the king and the crown prince, McMaster said.
Ahead of President Donald Trump's upcoming visit to the Middle East, Saudi Arabia has promised to make $40 billion of its sovereign wealth fund available to the United States to bankroll part of the roughly $1 trillion in infrastructure improvements that Trump promised on the campaign trail.
The former top emissary said an escalation of USA support for the Saudi offensive in Yemen is "something to watch for" in the aftermath of Mr. Trump's visit. After suggesting a "relook" at the One China policy, he invited President Xi Jinping to the White House and has sent senior diplomats to China in an attempt to clarify the USA position and improve relations.
On the other hand, news says British military fleet are allowed to enter to Persian Gulf after a long time through a framework coordinated with Trump.
Thus, US secretary of defence James Mattis declared in Riyadh that the "United States wants to see a strong Saudi Arabia", and added that "there is disorder wherever Iran is present". But until that happens, Trump might try to make common cause with his Gulf hosts against the Brotherhood, which is considered terrorist by Saudi Arabia and the U.A.E., but not by Kuwait, Qatar or Oman.
Trump's foreign trip has halts in Israel and the Vatican City as well.
Saudi Arabia and its Gulf allies also accuse Tehran of supporting the Shia Houthi militia group in Yemen, which overran much of that country in 2014.