This is Mitt Romney’s biggest problem.

Projecting moderation while professing extremism is quite a trick, and Romney may perhaps grasp the brass ring. But he makes everyone uneasy. Moderate Republican voters, of whom there may be more than meet the eye, may worry that President Romney will be captive to a GOP Congress beholden to the base. Tea Party types may worry that he’ll shake the Etch-A-Sketch again when dancing to a different piper, the general electorate and/or a divided Congress. No one, in any case, likes a liar, and people across the political spectrum know that Romney lies from sunup to sundown. Democrats know that nothing he says about Obama is true; conservatives know that nothing he says about his past positions and actions is true; and moderates know, or should know, that he’s betrayed them to the base.

Every politician plays the game, but Romney is just shameless.

This is one of the funnier Mitt Romney flip-flop videos.

It’s been a mixed bag for Newt Gingrich today. Rick Perry dropped out of the race and endorsed him, but now his second wife, Marianne Gingrich, has come forward to give details about their marriage.

You can watch the video above, and the full interview will air tonight on Nightline.

Basically, Newt Gingrich was having an affair during his second marriage with Callista, who later became his third wife. According to Marianne, Newt wanted an “open marriage” so that he could continue the affair.

I’m not a big fan of the private sexual life of a politician being an issue in campaigns. There are plenty of men who have had affairs who managed to be good presidents. The hysteria over Bill Clinton’s personal shortcomings was idiotic, as it led to impeachment hearings.

But we know that these things matters to some voters, particularly conservative and religious voters. Newt’s marital problems are well-known, but this salacious detail regarding his desire for an open marriage will certainly garner attention. Had Bill Clinton run again, his personal life and the Monica Lewinsky affair certainly would have been issues as well.

Also, there are few people as contemptuous as Newt Gingrich. He’s always willing to pass judgement on others, often in the harshest terms, so if anyone deserves this scrutiny it’s him. He doesn’t have a warm personality or a record of good will to fall back on.

It’s going to be fascinating to see how this plays out. Gingrich has a real shot at derailing Mitt Romney, but he needs to get past this story. If he can’t, then perhaps Rick Santorum can emerge as the last obstacle to a Mitt Romney nomination.

Rick Perry acknowledged that Newt isn’t perfect and he stressed the importance of forgiveness and redemption. Let’s see how the evangelical voters of South Carolina feel about it.

Rick Perry’s embarrassing foray into national politics will end today according to multiple press reports. In one of the worst fields of presidential candidates in modern political history, Rick Perry stood out as one of the chief yahoos in the confederacy of dunces.

This shouldn’t have been a surprise, as Perry’s main claim to fame leading up to 2012 was his suggestion that the State of Texas might secede from the union.

His debate “performances” have become legendary. He made George W. Bush sound like Lawrence Olivier. He consistently made outrageous statements, like this past week when he suggested that the leaders of NATO ally Turkey were “Islamic terrorists.”

Perry hoped that right wing hysteria might sweep him to the nomination, but Republican voters recoiled at his utter incompetence. You can’t rally voters if you can’t manage a coherent sentence. This week, Erick Erickson of RedState.com urged Perry to drop out. Understandably, conservatives do not want Mitt Romney as their nominee. Newt Gingrich is also a disaster for the GOP, but at least he has some credibility among conservatives and can handle himself in a debate.

Rick Perry finally realized that he had no chance in South Carolina and conservatives needed to stop splitting the anti-Romney vote. Perhaps he’s not quite as dumb as he sounds.

The “oops” candidate now leaves the national stage as one of the biggest laughing stocks in American politics.

Visit msnbc.com for breaking news, world news, and news about the economy

I have a feeling this story is going to get a lot of coverage again if and when Mitt Romney locks up the GOP nomination. Watch the video as Rachel Maddow revisits the story of Mitt Romney and the unfortunate incident when he placed his dog on the roof of his station wagon for a 12-hour road trip. At one point the dog became so scared or irritated that he defecated on the roof of the car. The story is pretty gross.

There are web sites sprouting up around the web (see Spreading Romney) and Newt Gingrich is also bringing this up in a web ad.

Small things like this can have a big impact on a campaign. With the Internet, you can see dog lovers making this a big issue. It doesn’t help that Romney already comes across as a stiff robot.

The Mitt Romney flip-flop ads just write themselves as Romney is the most brazen flip-flopper in modern political history. He’s a total opportunist.

While John McCain has now endorsed Romney, it’s fun to see one of the ads he ran against him back in 2008.

With his surprise showing in Iowa, Rick Santorum has become the new hope of the conservative movement, or at least some in the conservative movement. Santorum has been getting pummeled at conservative sites like RedState.com for his past support for pork barrel spending and other big spending programs during the Bush years when the GOP abandoned nearly everything they claimed to stand for regarding the size of government. Santorum has not joined the anti-earmark bandwagon pushed by the Tea Party, and Erick Erickson keeps hammering him for that.

At least one prominent conservative, however, is offering support to Santorum – George Will. Will offers up a column defending Santorum’s record, so let’s see if that changes the minds of some Tea Party members who are skeptical of Santorum.

The folks at BusinessInsider.com point out that Mitt Romney’s biggest problem might be his tax returns. So far he has refused to release his tax returns and he reiterated that position in a recent interview with Chuck Todd.

Romney’s campaign team has clearly decided that the political risk of releasing the returns outweighs the potential problems of not doing so. No one knows for sure what the documents would say, but by the candidate’s own admission, the bulk of Romney’s retirement income from Bain has been from capital gains, which are subject to 15% tax rate.

That means that for the past 10 years, Romney has likely been paying a lower tax rate than most middle class voters. If this is the case, that information could be devastating to Romney’s presidential bid.

The issue of tax fairness is huge right now, and Romney might become the poster-child for that problem. Warren Buffet has famously come out strong on this, saying that it’s not fair that he pays a lower effective tax rate on his income than his secretary.

I think this is a huge problem for Romney. If he makes it to the general election, the Obama campaign and the Democratic PACs are going to hammer him on not releasing his tax returns. If that issue catches fire and he ultimately releases them, then the story is huge.

But it’s huge regardless of when he releases them. He might want to just get it out of the way and have a response ready.

Either way this one can be problematic.

A super PAC supporting Mitt Romney has unleashed this ad against Newt Gingrich in Iowa. The focus on Newt’s “baggage” seems to be resonating.

Meanwhile, the PPP poll now has Gingrich in a free fall in Iowa, as he has slipped to third place.

Newt Gingrich’s campaign is rapidly imploding, and Ron Paul has now taken the lead in Iowa. He’s at 23% to 20% for Mitt Romney, 14% for Gingrich, 10% each for Rick Santorum, Michele Bachmann, and Rick Perry, 4% for Jon Huntsman, and 2% for Gary Johnson.

Gingrich won’t even spend time in Iowa, so I can’t imagine how he’s going to hold on against candidates who are betting their campaigns on the caucuses.

If this trend continues, you’ll see Santorum, Perry or Bachmann possibly get into the top three, so this race is still very fluid. Romney benefits from having the anti-Romney vote split up. The Iowa vote often breaks late, so anything can happen here.

How crazy is this guy?

Newt Gingrich loves to accuse his political opponents of being “radical,” and yet he tosses around radical statements on a regular basis. His latest comments on judges even have conservatives howling.

Now he’s talking about using the capital police or U.S. Marshals to arrest judges that he deems to be out of line. Here’s a statement to FOX News from Michael Mukasey, a former U.S. Attorney General under George W. Bush, who said Gingrich’s comment were “dangerous, ridiculous, totally irresponsible, outrageous, off-the-wall and would reduce the entire judicial system to a spectacle.”

The man is a complete buffoon, and it’s easy to see why the conservative establishment is horrified at the thought of this clown becoming the nominee.