There?s an art form to answering a question. Inside-the-Beltway types call it ?staying on message,? but it really just amounts to ignoring all distractions and talking about what you want to talk about, not what your interviewer, interrogator or intrepid debate opponent want to talk about.

Some people are better at this than others.

For example, it?s safe to assume that, on the eve of the Democratic national convention, Teresa Heinz Kerry didn?t want to be talking about why she tells people to ?shove it.?

She wanted to be talking about important things: Her husband?s service in Vietnam, or about the fact that she speaks five languages. Instead, she went off message in a confrontation with an editor from the Pittsburgh Tribune-Review. The incident happened after Heinz Kerry finished a brief pep talk to Pennsylvania Democrats. ?We need to turn back some of the creeping, un-Pennsylvanian and sometimes un-American traits that are coming into some of our politics,? she told them.

The newspaper?s Colin McNickle then asked Heinz Kerry what she meant by ?un-American activity.? ?I didn?t say that. I didn?t say that,? she sputtered, before heading off into slightly more dangerous ground. ?No, I didn?t say that, I did not say ?activity? or ?un-American.? Those were your words,? she claimed.

Now one lesson here is, in this age when everything is on tape (except of course visits to the National Archives by former national security advisors -- we can trust them), don?t claim you were misquoted unless you really were.

Heinz Kerry hadn?t mentioned ?activity,? but she had talked about ?un-American traits.? Still, instead of either answering McNickle?s question or returning to her message of hope, growth and opportunity (or whatever her message is), Heinz Kerry told the reporter, ?You said something I didn?t say -- now shove it.? Poor form -- unless her message was ?she speaks her mind, even when she?s wrong,? in which case it works.

Her husband?s not a lot better at staying on point.

Over the July 4 weekend, John Kerry told an Iowa newspaper, ?I oppose abortion, personally. I don?t like abortion. I believe life does begin at conception.?

Now, there are plenty of things a Democratic candidate wants to be talking about this year. Abortion isn?t among them. After all, there really isn?t much room for gain on this issue. A recent Gallup Poll of women ages 18 and older found that only 6 percent of pro-life and 3 percent of pro-choice women say abortion will matter when they vote.