Republicans on Capitol Hill said Monday they need more information about the agreement between the United States and Iran announced by President Donald Trump, and some are expressing scepticism as they ask the White House for details. The agreement announced Sunday to end the war in Iran, set for a ceremonial signing Friday in Geneva, is centered around reopening the Strait of Hormuz and lifting the United States' naval blockade in the region, along with financial incentives for Iran if it meets certain benchmarks. But Senate Republicans and Democrats who returned to Washington on Monday said there were still many unanswered questions about the deal and they need thorough briefings before it is finalised.