You would be hard pressed to find more than a few thousand Republicans on all of Long Island. Remember Long Island is the base of the vile Carolyn McCarthy who won a seat in the House of Representatives based solely on her promise to destroy our right to self defense. Long Island along with NYC is a Democrat stronghold.
Ummmm, this is patently untrue. As a lifelong LI resident among nearly 3 million in the Nassau/Suffolk region, (excluding, of course, Queens and Brooklyn, which are geographically part of LI but politically part of NYC), I can attest that there are *plenty* of Republicans on Long Island.
District by district, Suffolk County went overwhelmingly for Trump (except the sparsely populated, but rich, leftist Hamptons), while Hillary won Nassau County by a slim margin mainly due to urban population centers such as Hempstead and the uber-rich Northwest Shore.
Check out the map: