I think, prayers for his wife. She seems to be the one leading the way. She prays the rosary every day, even though she isn't Catholic (yet). If she is honesty seeking the truth then it's only a matter of time before they both find it.
And note the persecutions have started. Canadian authorities are investigating him i think--scrutinizing his medical license. There is a price to be paid for a public figure being so courageous to come out of atheism this way.