I just did a google search on this story. It hasn't been mentioned anywhere except for the Guardian, Salon, and the usual left-wing sites. The story must be a non-starter, or the Times would have brought it up by now.
I googled "Jimmy Allison" and "George Bush" to come up with this story.
http://www.60plus.org/news.asp?docID=286
Seems as the President had political experience with Allison on a Florida campaign previous to the Alabama campaign. Linda would like everyone to think the President had no experience in campaigns and was just dead weight that Jimmy had to look after.