Are Pharisees Jews? or They just a political group that was among the Jews during Jesus time?

I am studying the words of God. And, I am reading about the man that was blind and Jesus made him see. First the Pharisees questioned the man about his blindness. Then the Jews questioned his parents and the son about his blindness. So, to clear matter up I wanted to know are Pharisees Jews or not? Are these two different groups of people? And, Who were Moses disciples? the Pharisees or Jews? Thank you so much. Only biblical people reply.