KABUL, Afghanistan (AP) — The Trump administration is slashing $1 billion in assistance to Afghanistan and threatening further reductions in all forms of cooperation after the country’s rival leaders failed to agree on forming a new government.

The announcement came from Secretary of State Mike Pompeo on Monday after he made an unannounced visit to Kabul to meet with Ashraf Ghani and Abdullah Abdullah. Each has declared himself president of the country after disputed elections last year.

In an unusually harsh statement, Pompeo slammed the two men for being unable to work together and threatening a potential peace deal that could end America’s longest-running conflict.

“The United States deeply regrets that Afghan President Ashraf Ghani and former Chief Executive Abdullah Abdullah have informed Secretary Pompeo that they have been unable to agree on an inclusive government that can meet the challenges of governance, peace, and security, and provide for the health and welfare of Afghan citizens,” he said.

Pompeo said the U.S. was “disappointed” in both men and their conduct, which he said had “harmed U.S.-Afghan relations and, sadly, dishonors those Afghan, American, and coalition partners who have sacrificed their lives and treasure in the struggle to build a new future for this country.”

Pompeo said their inability to work together posed a “direct threat” to U.S. national interests, and the administration would begin an immediate review of all its support programs for Afghanistan, starting with a reduction of $1 billion in aid this year.

“We have made clear to the leadership that we will not back security operations that are politically motivated, nor support political leaders who order such operations or those who advocate for or support parallel government,” Pompeo said.