Because he made himself available to the news media to answer difficult questions.

You would like to know what are these difficult questions!

As always, he was the one to ask the most difficult questions to answer.

From the time they begin to talk, kids can ask some pretty difficult questions.

We had some very difficult questions to put to each other.

These are difficult questions, but they need to be asked.

We must ask and answer the difficult questions about the future of our country.

You often ask me difficult questions, and I don't answer.

Exactly how best to deal with the pain is a difficult question.

That is a difficult question for a woman to answer.