"I have made a mistake and it's really bothered me for a couple weeks now," Greene told a news conference. She added that "there's nothing comparable" to the Holocaust and "I know the words I stated were hurtful and for that I am very sorry."
The news conference came amid calls from some Democrats to censure Greene for her Holocaust remarks. Her comments had also been denounced by Republican congressional leaders.
She said she had visited the United States Holocaust Memorial Museum earlier on Monday. She also mentioned that when she was 19 years old, she visited the Auschwitz concentration camp in Poland where more than 1 million Jews were murdered by the Nazis.