But adding troops is a US tactic that has failed in the past and much will depend on the president's broader strategy for stabilising Afghanistan.
Defence Secretary Jim Mattis's chief spokeswoman, Dana W White, said yesterday that Mattis had made no decision on a troop increase.
White said in a written statement that "any decision about troop numbers will be made only after consultations" with other US government agencies, NATO allies and Afghanistan. Such consultations have been ongoing for weeks. Mattis is due to attend a NATO defense ministers meeting later this month.
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The plan envisions addressing the roles played by Pakistan, India, China and Iran and perhaps Russia. Pakistan is a particularly difficult problem because it has provided sanctuary for elements of the Taliban.
Among the Taliban's factions, the strongest is the so- called Haqqani network with its deep ties to Pakistan and particularly its intelligence agency.
The relationship dates back to the 1980s Afghan war against the Soviet Union, which had sent in more than 100,000 soldiers to support the pro-communist Afghan government. Pakistan has been a troublesome ally for multiple US presidents, permitting large-scale U.S. Air attacks on extremist targets but sometimes halfheartedly addressing threats itself.