By the time of McCarthyism, Wolf was being targeted by the United States Immigration and Naturalization Service as a subversive foreign national. Her deportation cases lasted from 1949-63. She later became a United States citizen, but made no apologies for having been a member of the Communist Party. Her later years were largely dominated by her environmental activism, which led her to Washington D.C. to lobby congress on issues that were important to her. She became nationally recognized and was awarded the National Audubon Society's Medal of Excellence.