left-wing

left-wing
ˌleft-ˈwing adjective
a left-wing person or group supports the political aims of groups such as socialists and communists
   OPP  right-wing:
    a left-wing newspaper
    a left-wing political organization
    She’s got very left-wing views.
—left wing noun [singular]:
    the left wing of the Labour party
—left-winger noun [countable]:
    She is supported by left-wingers in the party.
     

THESAURUS

   ▪ right-wing adjective a right-wing person or group wants low taxes, a strong army and police force, and the individual to be free from government interference as much as possible: right-wing political parties | Some of his supporters are very right-wing. | right-wing policies on gun control
   ▪ left-wing adjective a left-wing person or group wants the government to make society more equal by increasing taxes for rich people, and taking control of important industries and services: a left-wing newspaper | His views are very left-wing.
   ▪ green adjective [usually before noun] supporting policies and principles which will protect the environment: green politicians | the Green Party | The government is under pressure to improve its green credentials (=to seem more like it wants to protect the environment).
   ▪ radical adjective supporting political ideas that will involve great change: radical politicians | a radical economic reform programme
   ▪ liberal adjective supporting political ideas that will allow people to have greater freedom: They want the government to have a more liberal policy on drugs.
   ▪ moderate adjective having political opinions which are not extreme: People generally become more moderate as they get older. | The bill is supported by moderate Republicans.
   ▪ extreme adjective having political opinions which are considered to be very unreasonable by many people: His views on immigration are very extreme. | an extreme right-wing organization