Drain the swamp is a term which has been used primarily by American politicians.
Trump: Ethics reform package will 'drain the swamp... by CNN
The term alludes to the historical draining of swamps to keep mosquito populations low to combat malaria.
Crowd At Donald Trump's Rally Chant - 'DRAIN THE SWAMP!' by Patriotic Populist
The term has since been used as a metaphor by:
Winfield R. Gaylord to describe the socialist desire to "drain" the "capitalist swamp".
Winfield Romeo Gaylord was an American minister and Socialist politician from Milwaukee, who served one term as a member of the Wisconsin State Senate representing the Milwaukee-based 6th Senate District.
Victor L. Berger, who in his book Broadsides referred to changing the capitalist system as "drain[ing] the swamp"
Victor Luitpold Berger was a founding member of the Social Democratic Party of America and its successor, the Socialist Party of America.
Ronald Reagan, who called for "drain[ing] the swamp" of bureaucracy in the federal government in 1983.
Ronald Wilson Reagan was an American politician and actor who served as the 40th President of the United States from 1981 to 1989.
Nancy Pelosi while announcing her 100-Hour Plan in response to more than a decade of Republican rule.
Nancy Patricia D'Alesandro Pelosi is the Minority Leader of the United States House of Representatives and served as the 52nd Speaker of the United States House of Representatives from 2007 to 2011.
The 100-Hour Plan was a United States Democratic Party political strategy detailing the actions the party pursued upon assuming leadership of the 110th Congress on January 4, 2007.
Donald Trump to describe his plan to fix problems in the federal government.
Donald John Trump is an American businessman, television personality, politician, and the 45th President of the United States.
Subsequent protests against the role of Goldman Sachs alumni in his administration also used the metaphor.
The Goldman Sachs Group, Inc. is an American multinational finance company that engages in global investment banking, investment management, securities, and other financial services, primarily with institutional clients.
Traditional Unionist Voice on the front cover of their manifesto for the 2017 Northern Ireland Assembly election
Traditional Unionist Voice is a unionist political party in Northern Ireland founded on 7 December 2007, as an anti-St Andrews Agreement splinter group from the Democratic Unionist Party.