If Sarah Palin plans to run for president in 2012 (which I’m not yet sure if she’ll do), many people will vote for her. But count me as one of those Americans who will not check the box for Sarah Palin if that day comes.

There are a few reasons why I won’t vote for Palin for president. The biggest one, though, believe it or not, does not involve her politics. As a political moderate I agree with Palin on some issues and disagree strongly on others, which is also the case with the President.

The biggest reason, then, why I will not vote for Sarah Palin is that Sarah Palin is not a serious person.

In times like these as well as in times of prosperity, the President of the United States must be a serious person. This doesn’t mean they can’t be fun or funny; it means they have to understand the seriousness of the job and have the natural capacity to perform that job well.

Barack Obama is a serious person. I knew that when I voted for him. His politics aside, when he ran for president he understood the seriousness of the job. Sarah Palin, I think, does not.

If she were a serious person, she would not have quit the governorship of Alaska halfway through her term to become a TV star and write a book.

If she were a serious person, she would not use Facebook notes (which are probably written by a publicist anyway) to spread misinformation about health care reform and other serious issues I think deep down she knows to be false.

If she were a serious person, she would not tote her Down syndrome baby under her arm at every stop on her book tour to show off her “pro-life credentials” to her fans.

If she were a serious person, she would prepare for being president not by throwing firebombs on FOX News but by supporting bipartisan compromise and studying up on foreign and domestic affairs.

If she were a serious person, she would not be instigating so much anti-government hatred from the Tea Partiers when she has no intention of doing anything to solve the problems they decry except for make another stump speech rife with tired talking points.

Of course, all of this presidential-run talk is still speculative. And the fact that so many people care so much about Palin’s political future that they’re talking about it so early and frequently simply plays into Palin’s hand. But if she does run, she will have the Tea Party movement and its acolytes behind her. If she were a serious person, she would know she needs more than pissed off conservatives to win a presidential election.

But she is not a serious person. And it doesn’t look like she intends to become one any time soon. If that’s the case, and she does in fact run for the Republican nomination in 2012 and wins it, consider this my formal un-endorsement.

Seriously.