Washington and Riyadh are working to push through arms deals worth tens of billions of dollars ahead of U.S. President Donald Trump’s trip to the kingdom in May.

Deals, which include some new contracts and some already in the pipeline, are a sign of that President Trump intends to reinforce ties with his top regional ally. Both countries are eager to improve relations strained under President Barack Obama in part because of his championing of a nuclear deal with Iran.

The US has been the main supplier for most Saudi military needs, including fighter jets and command and control systems in recent years. Trump has vowed to stimulate the U.S. economy by boosting manufacturing jobs.

The package include a Terminal High Altitude Area Defense (THAAD) missile defense system with several batteries, news agency Reuters cited sources as saying. The THAAD system, like the one being made operational in South Korea, costs about $1bn. Also being negotiated is a C2BMC software system for battle command and control and communications as well as a package of satellite capabilities, both provided by Lockheed Martin Company.

Both parties are negotiating deals, which also include previously reported contracts or items under discussion for years. One such deal, an $11.5bn package of four multi-mission surface combatant ships and accompanying services and spares, was approved by the State Department in 2015.

Also, more than $1bn worth of munitions including armour-piercing Penetrator Warheads and Paveway laser-guided bombs made by Raytheon Company are included in the package, the news report said.

The Obama administration had offered Saudi Arabia more than $115bn in weapons. Most of the Obama-era offers, which are reported to Congress, became formal agreements though some were abandoned or amended.

Negotiations have picked up pace along with planning for Trump’s trip to Saudi Arabia, his first international visit as the President. A US-Saudi working group met at the White House Monday and Tuesday to negotiate the trip, as well as financing for military equipment sales and stopping terrorist financing.

Saudi foreign minister Adel al-Jubeir and other Saudi officials met with lawmakers in the US on 4 May, including Senators Bob Corker and Ben Cardin on the foreign relations committee.