By Samia Nakhoul, Humeyra Pamuk and Alexander Cornwell WASHINGTON/DUBAI (Reuters) - When U.S. President Donald Trump lands in Riyadh on Tuesday, he will be greeted with opulent ceremonies, gilded palaces and the prospect of $1 trillion in investments.

Israeli American advocates and the family of a freed Israeli hostage are sounding the alarm over President Donald Trump’s willingness to accept a “free” luxury jet from Qatar, pointing to the country’s close relationship with Iran and its long-standing support for Hamas leaders.

US President Donald Trump's Gulf tour this week will take him to Saudi Arabia, which he would like see recognise Israel, and the neighbouring UAE which has benefitted from Israeli

President Donald Trump heads to the Middle East for peace deals and business negotiations, even as tensions allegedly rise with Israeli Prime Minister Benjamin Netanyahu.

A series of side deals by the U.S. administration is raising questions about how closely in sync the allies are over major challenges in the region.

President Trump is leaving for his trip to the Middle East today. This comes as Edan Alexander, the last living U.S. citizen being held by Hamas, will be released in a few hours. NBC News' Yamiche Alcindor reports more details from the White House.