There were words, ‘August pick, October pick, and January pick” in the article titled “Biden’s Brief - Obama picked his running-mate to help him govern,” appearing in New Yorker magazine October 20 issue. The article deals with the character and political records of Joe Biden who made a name in the recent vice presidential debate by making for President Obama’s lethargic representation in the preceding presidential debate.
The words appear in the following statement:
In 2004, when John Kerry was conducting his search for a running mate, he divided his options into three groups, based on the electoral calendar. “Kerry said you can pick either a Mr. August, a Mr. October, or a Mr. January,” David Wade, who was Kerry’s press secretary at the time and is now serving in that role for Biden, told me. “In a perfect world, you have someone who is all three.”
By Kerry’s logic, Sarah Palin, the Alaska governor, whom John McCain named as his running mate, was an August pick. An October pick tends to be political—someone with strong, even strident campaign skills, Kerry’s choice—John Edwards—may have fallen into that category.”
As I’m totally ignorant of political affairs in U.S., I have no idea about what August, October, and January pick mean, though I understand Mr. August, Mr. October, and Mr. January mean respectively those who are picked up as the presidential running-mate according to the political calendar.
Are they political jargons, or just an application of greengrocery terms? What do they mean?

