WASHINGTON — Three years into a brutal war in Yemen, the Senate is weighing whether to end American support for the conflict — a decision that could roil the United States’ alliance with Saudi Arabia and threaten the heart of President Trump’s Middle East strategy.

A vote to limit presidential war powers in Yemen could happen as early as Wednesday, following a closed-door, classified briefing to senators by Secretary of State Mike Pompeo and Defense Secretary Jim Mattis.

Several senators signaled they would use the briefing on Yemen to also ask about the killing of Jamal Khashoggi, the journalist and Saudi dissident, inside the Saudi Consulate in Istanbul on Oct. 2. The death sparked international outrage over the kingdom’s heavy-handed tactics and renewed attention to the war in Yemen.

It may now also serve as the catalyst for approval of the War Powers Resolution, which the Senate rejected as recently as in March.