I thank The Post for its choice of author for the Jack Kemp-bashing cover story {"Jack Kemp: Fading Fast," Magazine, Oct. 11}. In his piece, Juan Williams shows he has no idea of impartiality in reporting; his account of the Kemp campaign is so biased as to be laughable. When he sneers that, during the interview, Rep. Kemp was "visibly impatient with the possibility that he might be late for his tennis game," Mr. Williams either is being presumptuous or is a mind reader. In either case, he should be in another line of work.

Mr. Williams makes much of the fact that Rep. Kemp puts a strong emphasis on winning, that he promotes his ideas zealously and that his favorite subject is the economy. Mr. Williams converts all these characteristics into deplorable flaws. In addition, he offers no comparisons with the other Republican presidential candidates. Let's be frank: George Bush is bland and uninspiring, and though Bob Dole's opinions seem sound enough, the man has a smugness of character that is unsettling.

I suggest that Mr. Williams submit his articles to the commentary and opinion section of the paper in the future, rather than write under a fac ade of objectivity. Again, I thank The Post for this piece; such blatantly prejudiced journalism can only help Rep. Kemp's campaign.

JOHN ERDOS

Washington

I was quoted in the article about Jack Kemp. The tennis anecdote I related was intended as an illustration of one of Rep. Kemp's most admirable attributes, namely, his competitive spirit -- a trait I believe would be important in a president.

Those to whom I have previously told the story have always correctly interpreted it as praise of Rep. Kemp's tenacious spirit. I was therefore most disappointed to see this incident presented in a negative context, suggesting a lack of compassion. Actually, the words "bloody" and "dizzy," describing my condition upon falling, represent an overstatement that I must have offered for dramatic effect. This account is one that competitors would immediately recognize as a high compliment to a friendly adversary.

I conclude by stating that I would have first returned the ball to win the point if the situation had been reversed. That's the way we both would want it.

BARNEY J. SKLADANY JR.

Washington