Qatar signed agreements to cooperate with the U.S. as well as purchase Boeing aircraft and MQ-9 drones during President Donald Trump's visit to Doha on Wednesday.

The president has said that his administration is looking to develop a new fighter that will be a "substantial upgrade" from current models.

Hillary Clinton breaks silence on Trump’s controversial $400m Qatari jet - Former presidential rival warns Republican that no one gives away such an expensive gift ‘without expecting anything in retur

The U.S. has grown closer to Qatar in recent years, so much so that the tiny nation has been at the forefront of high-stakes peace negotiations between global powers.

Qatar's offer of a luxury Boeing 747 to President Donald Trump has set off alarm bells within the US intelligence and diplomatic community. Trump has defended his deal with Qatar and has said only a fool would not accept such a gift.

President Donald Trump reiterated Tuesday that the jet gifted to him by Qatar is being given to the United States Air Force and the Department of Defense, suggesting that it would save American taxpayers money.

Sen. Chuck Schumer said Tuesday that "I am announcing a hold on all DOJ political nominees, until we get more answers" about a jumbo jet gift from Qatar.

Meanwhile, fallout continues over Trump's insistence on accepting a $400 million luxury plane from Qatar, which he said will place Air Force One. Democrats are preparing to announce plans to place holds on Trump's political Department of Justice nominees as they continue to raise concerns about ABC News' reporting that Trump has plans to accept an airplane from the Qataris to use as Air Force One.