Should evangelicals pray with Roman Catholics?

As I speak at conferences on Roman Catholicism worldwide and how Evangelicals should relate to it, a question often arises: ‘What about joint prayer? Could or should Evangelicals pray with Roman Catholics?’

Let me offer my rules of thumb as I wrestle with the issue.

1. The Bible is clear that we should pray for all men and women (e.g. 1 Tim. 2:1), so praying for those friends, colleagues, and family members who are Roman Catholics is mandatory.