how will developments against the personal attorney michael cowin and mr. trump's former campaign chairman affect the russia investigation. the top democrat on senate intelligence committee mark wa warner will join us. we'll hear what happened and what didn't at that meeting with world leaders, it's all ahead on "face the nation." good morning, welcome to "face the nation." tributes and condolences from around the country and around the world are pouring in following the death of georgue h. w. bush. late friday at his home in houston, texas. his body will be flown here to washington where he will lie in state at the u.s. capitol. a state funeral at washington national cathedral will take place on wednesday and then he will return to texas where he will be buried next to his wife, barbara, and hire daughter, robin. president trump declared wednesday a national day of mourning, that means the stock market and federal government will be closed down in honor of the 41st president. joining us now are former "face the nation" moderator now cbs contributor bob sch