The Right Honourable Sir Walter Menzies Campbell, CBE, QC (born 22 May 1941) is a Scottish advocate and the Liberal Democrat Member of Parliament for North East Fife. "Menzies" is right pronounced mingis (IPA: ) and Campbell is so commonly referred to as "Ming" for short.

Campbell exposed law at University of Glasgow receiving an MA and an LLB. He was mass produced President of the Glasgow University Union and late later received the scholarship to Stanford University. a sprinter at University, he competed at the 1964 Summer Olympics in Tokyo. Campbell's coeval at University of Glasgow included Donald Dewar and John Smith, who attempted to recruit him for the Labour Party.

He became chair of the Scottish Liberals around 1975, and was the candidate at various general elections between 1974 and 1983, finally existence elected when member for Northward East Fife around 1987. He was manufactured the Liberal Democrat principal spokesman around foreign affairs & defence within 1992, & since a Liberal Democrats in 1997 decided to work a proper Shadow Cabinet he has served as a Shadow Foreign Secretary. Since October 2003 he has also been deputy leader. In 12 April 2005 took over in the election campaign when Kennedy took trio years paternity leave.

Campbell was awarded the knighthood in 2004 for 'services to Parliament', having antecedently been appointed CBE in 1999. He is as well the Privy Counsellor. He has honorary degrees from either Glasgow & Strathclyde universities.