President Donald Trump will make a decisoin on whether or not to have the United States join Israel’s war with Iran “within the next two weeks,” a senior White House official said Thursday.

“He will make a decision within the next two weeks” about taking a direct military role in the conflict, White House press secretary Karoline Leavitt told reporters at a press briefing.

Leavitt said the decision was based on Trump’s view that Iran “may” or “may not” agree to a diplomatric resolution through negotiations over its nuclear program, Leavitt said.

The remarks come as Iran, Israel and America’s allies wait for Trump’s decision on whether to get involved in the escalating war in the Middle East. Trump has called on Iran’s “unconditional surrender” in recent days, something the Iranian regime has rejected.