National security advisor Robert O'Brien said that Trump's long-held campaign promise to end "ridiculous endless wars" in the Middle East was in the works.
The Taliban welcomed Trump's announcement saying it was a positive step toward a peace agreement.
Trump has denied a report he was briefed on intelligence that a Russian military intelligence unit paid bounties for the killings of U.S. soldiers in Afghanistan.
U.S. intelligence officials concluded that Russia secretly offered bounties to Taliban-linked militants for killing American troops in Afghanistan.
The Taliban order comes just days after U.S. peace envoy Zalmay Khalilzad was in Kabul and Doha.
The signing aims to end a months-long political stalemate that has hampered progress towards peace.
Pompeo's statement came as he flew home from a fruitless day-long effort in Kabul to end competing claims to the presidency by Ghani and Abdullah Abdullah and win their agreement to form "an inclusive government."
Villagers on the Greek island of Lesvos — a holding station for refugees from the Middle East and Africa — are fearing their safety as living conditions deteriorate and crime escalates due to a backlog of cases and closed borders in the North.
The Taliban demand for the release of its prisoners from Afghan jails cannot be a pre-condition to direct talks with the hardline group, Ghani said.
Millions of Afghans are anticipating that America's longest war fought in their country will end on Saturday as U.S. and Taliban negotiators are expected to sign a deal to allow a U.S. troop reduction and a permanent ceasefire.
NATO Secretary General Jens Stoltenberg told CNBC that if the U.S. was concerned about the rise of China then it was "even more important to maintain NATO to keep your friends and allies close."
The tentative truce agreement between the U.S. and the Taliban, reached Friday, represents a breakthrough after more than 18 years of war.
An Afghan defense ministry official, who was not identified because he was not authorized to speak to the media, said the shooter was an Afghan soldier who had argued with the U.S. forces before opening fire.
U.S. and Afghan forces were conducting a joint operation when a person wearing an Afghan uniform opened fire on them with a machine gun, an official said.
The chief of staff of the U.S. Air Force, Gen. Dave Goldfein, confirmed to CNBC the plane that crashed was an Air Force E-11 military airplane. The plane crashed Monday in territory under Taliban control. Arif Noori, a spokesman for the governor's office in Ghazni, said fire brigades, security officials and rescue teams were at the scene of the crash.
A passenger plane has crashed in Afghanistan's central Ghazni province, a senior Afghan official told NBC News. CNBC's Phil LeBeau reports.
"I am one of the few leaders that has an excellent relationship" with Trump, Ghani said at the World Economic Forum in Davos, Switzerland.
A conflict between America and Iran would be "much, much more difficult" than the one in Afghanistan, Pakistan's Prime Minister Imran Khan said.
Global terrorism claimed less lives in 2018 but costed the global economy a conservative estimate of more than $34 billion, according to a report.
The U.S. airstrike that killed Iran's top commander showed Tehran that it can't get away with its provocations, Saudi Prince Turki Al-Faisal said.