Qatar's Sheikh Tamim bin Hamad Al Thani was hosted by Defense Secretary James Mattis on Monday where the two participated in bilateral talks at the Pentagon.
Saudi Arabia and its regional allies, the UAE, Bahrain and Egypt, launched a diplomatic and trade boycott against Doha previous year, and Trump initially appeared to take Riyadh's side. "It's getting stopped and fast - very important".
A top fundraiser for Trump also filed a lawsuit last month against Qatar and lobbyists working for the state, alleging they hacked his and his wife's emails as part of the ongoing dispute. "We do not and we will not tolerate. people who fund terrorism".
The Saudi-led coalition are believed to have been angered by Qatar's hosting of dissidents from across the Gulf and being home to Doha-based Al Jazeera, which has criticised Saudi Arabia and UAE allies in the region.More news: Offense shut down again in 3-0 loss to Chicago Cubs
Mattis also stressed that Washington was seeking to cooperate with Qatar in order to achieve peace in the Middle East on several fronts, such as combating terrorism, defeating the Islamic State of Iraq and the Levant (ISIL, also known as ISIS), and undermining Iran's activities in the region. Over the months, the Trump administration has pushed for a resolution to the crisis, especially after an early effort to mediate a resolution lost momentum. Qatar denies the allegations.
Trump hasn't recently repeated the charge about Qatari funding for extremism, and US officials have credited Qatar with making progress in cracking down and improving transparency.
Nor was it clear what gave the president any reason to be optimistic the Gulf crisis will end any time soon. "There are a lot of good things happening".
In a related development, Saudi Arabia could consider a proposal to dig a maritime canal along the kingdom's border with Qatar, turning the peninsula-nation into an island and transforming its only land border into a military zone and nuclear waste site, state-linked Saudi newspapers reported Monday.More news: Hart focused on West Ham, not England
Despite the past tensions, there were signs that Trump was warming to the Qataris.
The package of missiles planned to be sold to Qatar contains about 5,000 Advance Precision Kill Weapon Systems (APKWS), including 5,000 high explosive warheads.
He said the region can not accept people who support terrorism.
"... Waxaan rabaa inaan u mahadnaqo Madaxweyne Trump si shaqsiyan isugu mashquuliyey xalinta khilaafka dalalka GCC (Khaliijka), wuxuuna sidoo kale gacan nasiiyey xiligii xayiraada nala saaray, waxaana sidoo kale u mahadnaqayaa shacabka Maraykanka taageerada ay nasiiyeen..." ayuu yiri Amiirka Qatar oo la hadlayey warbaahinta xiligii uu la kulmayey Trump.More news: Guardiola: Man City deserve greater title credit after derby defeat
Qatar has long sought to stress its role as an agreeable US partner in a strategically vital region.