U.S. envoy Steve Witkoff is planning to brief a small bipartisan group of senators on the war in Iran in a classified setting Tuesday afternoon, according to three people familiar with the matter.Why it matters: Senators are hungry for real-time information on President Trump's next moves in Iran, the prospects for a diplomatic solution and thoptions for reopening the Strait of Hormuz.There is also heightened interest in details about any lines of communication between the Trump administration a...