Because I must keep writing my book. (No, not this one, my next one.)

This is an interesting story to monitor:

Fred D. Thompson, who is campaigning for president as an antiabortion Republican, accepted an assignment from a family-planning group to lobby the first Bush White House to ease a controversial abortion restriction, according to a 1991 document and several people familiar with the matter.

A spokesman for the former Tennessee senator denied that Thompson did the lobbying work. But the minutes of a 1991 board meeting of the National Family Planning and Reproductive Health Assn. say that the group hired Thompson that year.

His task was to urge the administration of President George H. W. Bush to withdraw or relax a rule that barred abortion counseling at clinics that received federal money, according to the records and to people who worked on the matter.

The abortion "gag rule" was then a major political flashpoint. Lobbying against the rule would have placed Thompson at odds with the antiabortion movement that he is now trying to rally behind his expected declaration of a presidential bid.

Thompson spokesman Mark Corallo adamantly denied that Thompson worked for the family planning group. "Fred Thompson did not lobby for this group, period," he said in an e-mail.

In a telephone interview, he added: "There's no documents to prove it, there's no billing records, and Thompson says he has no recollection of it, says it didn't happen."

CHARLES adds: I think we should note that this story is looking increasingly fishy.