REMOVING ALL DOUBT…. When it comes to controversial politicians, oftentimes, less is more. If only they realized it.

These politicians, generally motivated by ego, tend to think they’re better off saying more about whatever it was that got them into trouble in the first place, and in turn, they don’t recognize the value in shutting up. We saw this dynamic play out quite clearly with South Carolina Gov. Mark Sanford (R), who kept elaborating on the affair that put his career in jeopardy.

And we’re seeing it again with Alaska Gov. Sarah Palin (R), who, we’ve learned, can’t quite come up with a compelling spin for her inexplicable resignation. Here she is today, tweeting about her take on recent criticism.

Problem w/Professional Politicians:They’re more concerned w/holding a title in perpetuity than just accomplishing goals they promised voters

Now, this is clearly a very foolish argument. For example, no one has suggested that Palin hold onto her office “in perpetuity.” Some have suggested that she at least complete her one term in office. Palin still has 18 months left on the job she asked voters to give her. A year and a half may seem like a long time for someone anxious to pursue new adventures, but “perpetuity”? Please.

For that matter, the whole point of the controversy about Palin’s sudden and unexplained resignation is that she isn’t accomplishing the goals she promised voters. She asked Alaskans to give her a shot; they agreed. Now, instead of accomplishing the goals she promised voters, she’s quitting in the middle of her only term in office. If accomplishing goals were Palin’s top “concern,” she’s stay in office and try to, you know, accomplish goals.

Also note the almost comical arrogance. She’s not like those “Professional Politicians”; she’s better than them. While they complete their terms and follow through on their promises to the public, Palin knows a better way — quit before the job is done, blow off the promises, and then lecture everyone about the “problem” with those who complete their terms in office.

There’s an expression attributed to Abraham Lincoln: “Better to be silent and be thought a fool, than speak out and remove all doubt.” Someone really ought to let Palin know about this.

Steve Benen

Follow Steve on Twitter @stevebenen. Steve Benen is a producer at MSNBC's The Rachel Maddow Show. He was the principal contributor to the Washington Monthly's Political Animal blog from August 2008 until January 2012.