Driven out of Gaza two decades ago by Hamas, strapped for cash and headquartered in the Israeli-occupied West Bank, the Palestinian Authority's hopes of running a future Palestinian state have long seemed bleak. Its prospects, however, appeared to brighten briefly on Monday when US President Donald Trump announced a plan to end the Gaza war that hinted at a future role for the PA and its 89-year-old leader President Mahmoud Abbas, who hasn't faced an election since 2005. Yet the terms laid out in Trump's 20-point plan require the PA to carry out difficult reforms before it can run Gaza again, setting a tricky path for its return to the territory where Israel has said it can play no role...