Trump scrambles to find top national security aide

By Jeff MasonNORTH CHARLESTON, S.C. (Reuters) - U.S. President Donald Trump, scrambling to find a new top security aide after firing his first one and being spurned by another candidate, said on Friday he has four people under consideration including acting national security adviser Keith Kellogg.Trump ousted Michael Flynn on Monday in a controversy over the retired lieutenant general's contacts with Russia.Retired Vice Admiral Robert Harward on Thursday turned down the Republican president's of