Which of the Following Contain Ad Hominem Fallacies

Short Answer

Which of the following contain ad hominem fallacies?
1. Senator Smith was involved in serious criminal activities before he was elected. He was let out of jail on a technicality. Senator Smith is the sponsor of the new housing bill. Therefore, the new housing bill is not a good bill.
2. Senator Smith was involved in serious criminal activities before he was elected. A U.S. senator should be trustworthy. Therefore, Senator Smith is not qualified to be a U.S. senator.
3. Professor Jones says that socialism is a good thing. But Professor Jones is a former member of the Communist Party and once advocated killing all priests and nuns. So socialism must not be a very nice system.