Possible Clues:

• Satirist Tom
• Jim who anchored 'PBS NewsHour'
• Song satirist Tom
• Longtime PBS news anchor
• Tom __, US mathematician and satirist whose songs include The Vatican Rag
• Longtime news anchor Jim
• Tom __, satirist whose songs include Poisoning Pigeons in the Park
• Tom __, satirist known for poisoning pigeons in the park?
• "The Elements" songwriter Tom
• MacNeil's longtime partner