US 'not winning' in Afghanistan: Pentagon chief
US President Donald Trump listens to remarks by Defense Secretary James Mattis (R) after a swearing-in ceremony for Mattis at the Pentagon in Washington in January 2017.
The Taliban had a good year last year, Mattis said at a hearing about the Pentagon's budget.
Pentagon chief Jim Mattis told exasperated lawmakers Tuesday that America still is "not winning" in Afghanistan, as US military commanders push for additional troops to help stabilise the country's security crisis.
Mattis's latest assessment comes nearly 16 years after the US-led invasion of Afghanistan and amid a war that continues to claim the lives of US troops each year - and those of thousands of local forces and civilians.
The "Taliban had a good year last year, they are trying to have a good one this year," Mattis told the Senate Armed Services Committee at a hearing about the Pentagon's budget.
"Right now I believe the enemy is surging."
US military commanders, who saw fragile security gains eroded under Obama-era troop draw-downs, have been pushing for a new strategy that could see thousands of additional soldiers deploy to Afghanistan to help train and advise beleaguered Afghan partners.
Media reports have said Mattis is considering asking for 3,000 to 5,000 additional US and NATO troops, but the defense chief has said little on the matter. In February, General John Nicholson, who commands NATO forces in Afghanistan, warned that he needs "a few thousand" more troops to reverse what he called a stalemate.
Despite months of expectation that a new Afghanistan strategy announcement is imminent, Mattis said this would not be ready before mid-July.
Republican Senator John McCain, who chairs the Senate Armed Services Committee, voiced his 'palpable' frustration. "We're now six months into this administration, we still haven't got a strategy for Afghanistan," McCain said, noting it was hard to get behind an Afghanistan budget request without knowing what the plan is.
"We know what the strategy was for the last eight years: Don't lose. That hasn't worked."
Mattis acknowledged the reality on the ground. "We are not winning in Afghanistan right now. We will correct this as soon as possible," he said.
The defence chief, who was a Marine combat commander in Afghanistan at the start of the war, stressed America must not walk away from the country and suggested a long-term residual US force needs to remain to help the Afghan army maintain a baseline of security.
"It's going to be an era of frequent skirmishing and it's going to require a change in our approach from the last several years if we're to get it to that position," Mattis said.
The Afghan conflict is the longest in American history, with US-led NATO troops at war there since 2001, after the ousting of the Taliban regime just months after the September 11 terror attacks in the United States.
The ongoing security crisis has seen not just the Taliban gain ground, but also the emergence of other groups such as a local Daesh group.
On Saturday, the Taliban claimed responsibility for an insider attack in which an Afghan commando turned his weapon on American troops, killing three and wounding another.
US troops in Afghanistan number about 8,400 today, and there are another 5,000 from NATO allies, who mainly serve in a training and advisory capacity.