TAPPER: Welcome back. More in our politics lead. Everybody is talking about Comey testifying Thursday, but tomorrow, four top national security officials will testify on Capitol Hill and they are sure to be asked about the ongoing Russian investigation, as well as possible charges of obstruction of justice. CNN's Manu Raju joins me now live from Capitol Hill. And, Manu, what should these four national security officials who are testifying, what should they expect?</s>MANU RAJU, CNN SENIOR CONGRESSIONAL REPORTER: Well, Jake, this is supposed to be a hearing about reauthorizing the key federal surveillance law, but expect a lot of questions about Russia, the investigation as well as whether or not President Trump in any way tried to tamper with that investigation. Now, I'm told by several senators on the committee that they plan to push a number of these officials to explain their interactions with President Trump, namely Dan Coats, a former director, the former senator and current director of national intelligence who reportedly came under pressure by President Trump to publicly rebut that this investigation came to any conclusion about collusion between Russian officials and Trump officials. Now, when Coats went before the Senate Armed Services Committee last month, he would not discuss his interactions with Trump and Mark Warner, the top Democrat on the Committee, earlier today told our colleague Jeremy Herb that Director Coats will be happy to tell the whole truth before the appropriate committee, meaning the Senate Intelligence Committee. Now, Rod Rosenstein, another person to watch, Jake, the first time the deputy attorney general has talked in public since the firing of James Comey. A lot of questions will be asked about the circumstances around the firing. Ron Wyden, a senior Democrat on committee, Jake, tells me that he plans to ask him whether or not he was fired because -- because the president wanted the Russia investigation to go away. That's what we can expect at a hearing with a lot of fireworks tomorrow, Jake.</s>TAPPER: All right. Manu Raju on Capitol Hill for us -- thanks so much. How will President Trump's tweets about Qatar impact the safety of thousands of U.S. troops stationed in that country? We'll take a look at that next. Stay with us.
Agency Heads to Testify on Capitol Hill Tomorrow.