Police are bracing for a crowd of up to 13,000 and protesters have already announced plans to hold a peaceful anti-Trump rally outside the venue.
A witness helped apprehend the suspect near the scene less than an hour later.
Edward Korona was also charged with official misconduct, offering a false instrument for filing, making an apparently false sworn statement.
Police caught one suspect and are offering a $25,000 reward for up to four others believed to be involved.
The Long Island-native Piano Man gave the Uniondale arena a fitting farewell as it closes for renovations.
A 58-year-old woman was killed when an alleged speeder crashed his vehicle into hers in her hometown of East Meadow on Monday night, Nassau...