northwoods:

From what I hear, it was McCain who did the "roaming". Joe Biden remained faithful to his wife. When she was killed, he raised his sons on his own. Later he married again and remained faithful to his present wife as well.

I would think you would steer clear of the "roaming" references.

Roman Catholic---Roaming Catholic. Just a play on words. On a scale of 1 to 10 it should rate at least a 3!