KINGSTON, NY — Former President Donald Trump’s upcoming Madison Square Garden rally is a joke, if a “depressing” one, to many New York business owners. Tuesday, as the sun was still rising on a brisk, windless fall morning at the Wiltwyck Golf Club, down-ballot congressional candidates made their clunky pitches to local business owners, who sometimes found themselves more fixated on the buffet of eggs, bacon and quasi-fresh fruit laid out for them than on the politicians at the lectern. The otherwise unremarkable event is memorable for showcasing the contortions of Democratic and Republican ca…