It's Politico, so, you know, take it for what it's worth:
Several Republican officials close to Fred Thompson’s presidential campaign said they expect the candidate will drop out of the race within days if he finishes poorly in Thursday’s Iowa caucus. [. . .]When Sean Hackbarth comes back from DC next week, he may need a place to crash. Hope someone can hook him up . . .
A Thompson campaign source said there is “a strong likelihood” that if Thompson comes in a distant third in Iowa, with less than 15 percent of the vote, he would drop out soon—most likely before this weekend’s New Hampshire presidential debates.