Scott Conroy has a well-reported article on grassroots efforts to organize in Iowa for a potential Sarah Palin presidential candidacy. Palin’s entry into the race would shake things up, of course. But is it going to happen?

The fact that Palin hasn’t cancelled her contract with Fox News Channel, despite the network’s insistence that presidential candidates leave the network as paid contributors, suggests the former Alaska governor is not going to run.

Here’s the thing, though: Palin is impulsive. She decided to challenge Frank Murkowski in the Republican primary in 2006 without much preparation. She agreed to be John McCain’s running mate in 2008 without hesitation. Her decision to resign from the governorship in July 2009 caught most of the country completely off guard.

There’s no predicting what she’ll do next. Which hurts her viability as a candidate (in my opinion). But which also does not preclude her deciding to run in the coming weeks or even months.