Conversation so far:
What support Joseph McCarthy provide for Roman Catholics?
One of the strongest bases of anti-Communist sentiment in the United States was the Catholic community, which constituted over 20% of the national vote.
What was his involvement with that group?
McCarthy identified himself as Catholic, and although the great majority of Catholics were Democrats, as his fame as a leading anti-Communist grew.
What cooperation he had with them?
he became popular in Catholic communities across the country, with strong support from many leading Catholics, diocesan newspapers, and Catholic journals.
How did they go for their agenda against communists?
CANNOTANSWER.
How was he involved with the Kennedys?
McCarthy became a close friend of Joseph P.
Kennedy Sr., himself a fervent anti-Communist, and was a frequent guest at the Kennedy compound in Hyannis Port.
What their involvements entailed?
He dated two of Kennedy's daughters, Patricia and Eunice.
It has been stated that McCarthy was godfather to Robert F.
Kennedy's first child.

Question: How they influenced each other?
Self-contained rewrite: How Robert Kennedy and Joseph McCarthy influenced each other?