The end is near

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Across
  1. 4. Northern most SUNY
  2. 5. Last city on Long Island
  3. 7. One rank behind valedictorian
Down
  1. 1. University with most presidential alumni
  2. 2. Most popular U.S city to study political science; comic books
  3. 3. Only Ivy League in New Hampshire
  4. 6. Abbreviation of largest university in NYC