Via Reuters, yes, I'd say Newt's campaign is very much in doubt, alright. Now, he'll only hurt his reputation with many in the base if he remains in the race...
"This really was his last chance to show whether he had the ability to win," said Natalie Davis, professor of political science at Birmingham Southern College in Birmingham, Alabama. "If he can't win in Alabama ... he really can't win anywhere. This was his last stand and he lost."
...I backed Newt after Perry dropped and didn't turn on him after he imploded in Florida, while also having a terrible debate. I've been content to watch it play out, not hitting either him, or Santorum. But all Newt can be from here on is a spoiler.
The bottom-line is, whether you back him, or not, Santorum has won himself the right to go one-on-one with Romney and settle things cleanly and once and for all. Not only will Newt begin to lose more and more friends across the conservative base by staying in - they'll see it as his ego and Adelson's money keeping him in - he's likely to begin performing worse and worse, only making it all the worse for him.
By losing as he did last night, he proved he can't win much of anywhere. His candidacy is not viable. The only honorable move left for Newt is to drop out. Do the right thing, Newt. Enough GOP primary voters have spoken that, in my opinion, the best thing Newt can do now is to show some respect for them.
What's been fascinating about Santorum's rise is that he's done it even though Gingrich (and earlier, other conservatives) split the base's vote.
Romney's problem is that he abandoned the base from the start. That doesn't seem to me to be a viable plan to win the primary, much less the general.
• In defense of Rick Santorum.
• Rick Santorum for President.