RAMALLAH, West Bank — In the 14 months since revolution has spread across the Middle East and tension has soared over Iran’s nuclear program, the Palestinian leadership has found itself orphaned. Politically divided, its peace talks with Israel collapsed and its foreign support waning, the Palestinian Authority is sidelined, confused and worried that its people may return to violence.

“The biggest challenge we face — apart from occupation — is marginalization,” Salam Fayyad, prime minister of the Palestinian Authority, said in an interview. “This is a direct consequence of the Arab Spring where people are preoccupied with their own domestic affairs. The United States is in an election year and has economic problems, Europe has its worries. We’re in a corner.”

For decades, as autocrats ruled their neighbors, the Palestinians were at the center of Middle Eastern politics, their struggle with Israeli occupation embodying the Arab longing for post-colonial freedom and dignity. The Obama administration came into office asserting that a state in the West Bank and Gaza was the key to regional progress.

But when Prime Minister Benjamin Netanyahu of Israel visited Washington this week, the conversation was dominated by Iran, not peace talks or occupation.