US military leaders have recommended that Washington should leave as many as 20,000 American troops in Afghanistan after 2016, says Senator John McCain.

"Well, [the] first recommendation I'm told was 20,000," the Arizona Republican said in an interview aired Monday night, according to The Hill.

"I would have, I think, been comfortable with, say, 10,000 to 15,000. But -- again -- it's very clear that what you need to do is withdraw on basic conditions, not on calendar," the chairman of the Senate Armed Services Committee added.

President Barack Obama plans to keep 5,500 of US troops in Afghanistan when he leaves office in 2017.

Obama had originally planned to withdraw almost all US troops from Afghanistan by the end of next year and keep a small, embassy-based military presence in the Asian country.

But the Pentagon has been arguing for months that Kabul needed additional US military presence in order to defeat a resurgent Taliban movement.

McCain contended that trying to reach the "bare minimum" would further endanger the lives of US military personnel in Afghanistan.

[caption id="" align="alignnone" width="550"] McCain listens to US Army Gen. John Campbell, commander of US forces in Afghanistan, testify during a Senate Armed Services Committee hearing on September 6, 2015. (AFP photo)[/caption]

He said the recent US bombing of a hospital in Kunduz, which according to US officials was a mistake, showed the Afghans still needed US support.

"They don't have an air force. They don't have good intelligence.� They don't have [medical evacuation] capability, for example. There are so many things that we can do in support that we would have to do," he said.

McCain attributed the failure of Afghan forces to keep their country secure to a swift withdrawal of US forces and a continued Taliban sanctuary in Pakistan.

The US and its allies invaded Afghanistan on October 7, 2001 as part of Washington�s so-called war on terror. The offensive removed the Taliban from power, but foreign troops have still not been able to establish security in the country.

McCain also said the US still has troops in many other countries and Americans are not calling for their withdrawal because they are safe.

"We got 38,000 troops still in Korea. We've got troops in Germany. We've got troops in Bosnia. We have left state-rising forces behind ever since World War II," he said.

By Press TV