Crossword Puzzle Combine against, with ''on''

Clue: Combine against, with ''on''

America's 39th President (CARTER with 6 letters)
39th of 50 (NORTHDAKOTA with 11 letters)
Favorite Hall of Famer of the 39th U.S. president? (GARYCARTER with 10 letters)
39th president of the United States (JIMMYCARTER with 11 letters)
It equals 0.3937 inch (CENTIMETER with 10 letters)
Alma mater of the 39th Pres. (USNA with 4 letters)
Super Bowl to be played in the year 3968, at the current rate (MMII with 4 letters)
39th VP (AGNEW with 5 letters)
39th vice president (AGNEW with 5 letters)
39th Veep (AGNEW with 5 letters)