The answers to the clues below will have something in common.

1. Home-state candidate
2. The B in BFF
3. Fire or police boss
4. Nine judges' home
5. Title-shot hopeful
6. Fancy restaurant honcho
7. Helen Hayes, for one
8. Spouse or steady date
9. Trial VIP
10 U.S. President, wife, and kids

Answers:

1. Favorite son
2. Best
3. Chief
4. Supreme Court
5. Top contender
6. Head waiter
7. Leading lady
8. Main squeeze
9. Star witness 
10. First family -  - - superlatives

Credit:
Fred Piscop
FIRST OF ALL