The Republican base has been switching between various anyone-but-Romney candidates, but time is running out. The Iowa primary is on January 3. Cain's star seems to have burned out; I can't imagine people overlooking the rate at which new scandals and gaffes come up. Bachmann and Perry have already had their time in the spotlight and were then passed over. Ron Paul is a poor fit on many issues, as is Huntsman. Santorum has been in the last tier in polls throughout the campaign and can't seem to get people excited. So Gingrich, as flawed a candidate as he is, may be the only plausible right-wing alternative to Romney.