Congress will receive a visit later this week from strapping young man Johnny Armstrong, Beltway sources reported Tuesday. The robust, corn-fed 20-year-old is expected to discuss numerous key issues and impress legislators with his sturdy frame and genial, easygoing manner. 'What a fine young man,' Sen. Arlen Specter (R-PA) said of the all-American boy with the winning grin. 'Johnny Armstrong gives me hope for the future of this nation.' 'I don't know what he is going to speak about,' Sen. Robert Byrd (D-WV) said, 'but what a charming, handsome young fellow--much better than the pale, uncharismatic sort we usually get around here.' 