Trump will win Staten Island, probably by high single digits. As others have said, he crushed there in the primary.
He also "crushed" in every New York City borough except Manhattan. Think he's going to win those, too? Is he also going to win in Nevada? He "crushed" there as well.
Unlike the other four boroughs of NYC, there are real Republicans in Richmond County (Staten Island). Republicans actually control the Borough President's office and have for a long time. Their Congressman is a Republican and 2 of the 3 city council members are Republican. (There is just one other Republican city councilman on the entire council in NYC and he's from Queens).
Trump took 82% of the vote in Richmond, more votes by percentage than anywhere else in New York. The percentage of the vote was not even close elsewhere in the state.
Trump broke into the low-70s in Suffolk County (72.5%) and Putnam County (70.4%).
As far as Nevada goes, I give him a better chance there than the red avatars on this forum do. There's the resort effect, plus, in a more competitive race, Republicans have a chance there. Realistically, the state has a slight lean Democrat, but it's definitely not out of the realm of possibility that if Trump wins the popular vote by a point or two, he takes Nevada.