It’s my *opinion* based on events, that a Newt decision not to back Santorum or form a coalition with him, became a significant factor in Santorum’s decision to suspend.
An interesting theory. Hadn't thought of that. What I'd like to know is why RS offered no explanation. He was running second, but it appeared to be a healthy second. For sure I do not think the family sat around the table and said, "This is getting too difficult on us, let's quit."