My guess is that the Italian pronunciation includes the vowel at the end, as with most words ending with vowels. Senator Geary's snide "Cor-le-on-neee" mocks Italianisms. I don't know if leaving the vowel off at the end is a dialect or Americanized Italian, or both. In New York, you hear "provolone" without the final vowel, but my Grandma Carmela, from Calabria, included it. Yet she also referred to her favorite singer as "Perry Com'". I always wondered about that!

Any dialecticians in the room?