Sangaree became the president of the ACTC's Youth Front in 1970. He stood as the ACTC candidate in Kilinochchi at the 1970 parliamentary election. He won the election and entered Parliament.
In 1970, Sangaree assumed leadership of the ACTC's Youth Front. He contested the Kilinochchi parliamentary seat on behalf of the ACTC and was successful, subsequently becoming a member of Parliament.