President Trump’s most senior military and foreign policy advisers have proposed a major shift in strategy in Afghanistan that would effectively put the United States back on a war footing with the Taliban.

The new plan, which still must be approved by the president, calls for expanding the U.S. military role as part of a broader effort to push an increasingly confident and resurgent Taliban back to the negotiating table, U.S. officials said.

The plan comes at the end of a sweeping policy review built around the president’s desire to reverse worsening security in Afghanistan and “start winning” again, said one U.S. official.

The new strategy, which has the backing of top Cabinet officials, would authorize the Pentagon, not the White House, to set troop numbers in Afghanistan and give the military far broader authority to use airstrikes to target Taliban militants. It would also lift Obama-era restrictions that limited the mobility of U.S. military advisers on the battlefield.

The net result of the changes would be to reverse moves by President Obama to steadily limit the U.S. military role in Afghanistan, along with the risk to American troops and the cost of the war effort, more than 15 years after U.S. forces first arrived there.

Trump is expected to make a final call on the strategy before a May 25 NATO summit in Brussels that he plans to attend.

Officials said it is unclear whether Trump, who has spoken little about the United States’ longest war, will look favorably upon expanding the U.S. role in Afghanistan. While he has voiced skepticism about allowing U.S. troops to become bogged down in foreign conflicts, the president has also expressed a desire to be tough on terrorism and has seemed to delight in the use of military force.

“The review is an opportunity to send a message that, yes, the U.S. is going to send more troops, but it’s not to achieve a forever military victory,” said Andrew Wilder, an Afghanistan expert at the U.S. Institute of Peace. “Rather, it’s to try to bring about a negotiated end to this conflict.”

The new strategy is a product of the U.S. military’s mounting worries that the fragile stalemate with the Taliban has been steadily eroding for years, jeopardizing the survival of an allied government and endangering a key U.S. base for combating militant groups such as al-Qaida and the Islamic State throughout South Asia.

Even as it moves to the president’s desk, the proposal faces resistance from some senior administration officials who fear a repeat of earlier decisions to intensify military efforts that produced only temporary improvements.

Inside the White House, those opposed to the plan have begun to refer derisively to the strategy as “McMaster’s War,” a reference to H.R. McMaster, the president’s national security adviser. The general, who once led anti-corruption efforts in Afghanistan and was one of the architects of President George W. Bush’s troop surge in Iraq, is the driving force behind the new strategy at the White House.