FASAYIL, West Bank — More than three hours had passed since Prime Minister Benjamin Netanyahu had dropped his campaign bombshell: If re-elected, he would annex the Jordan Valley in the Israeli-occupied West Bank.

But the news had barely begun to reach the people in Fasayil, a sleepy Palestinian hamlet in the Jordan Valley about 10 miles north of Jericho. The surprise announcement left many in the village seemingly unsure how to respond, as if they hadn’t yet received direction from the Palestinian Authority, the self-governing body with limited powers that provides some services here.

“Let them annex it,” Muhammad Musa, 22, said of the Israelis. “It would be much better for our work.” Like three of his brothers and most of the other men in this village of about 2,000 people, Mr. Musa labors by day as an agricultural worker in Tomer, an adjacent Jewish settlement.