Demonstrators gathered near where the children of US President Donald Trump were opening a new Trump International hotel on Tuesday.Chanting, "Hey. Hey, Ho. Ho. Donald Trump has got to, " a crowd of dozens gathered outside the hotel.Inside, the president's sons, Donald Trump Jr. and Eric Trump, presided over the hotel's grand opening.Donald Trump, Jr., the president's eldest son, made a passing reference to his father as he complimented one of the hotel officials."Thank you very much also for your great tutelage of your son, he said, coming from someone that has some experience with a generational family businesses, I know how it's not always easy."Like his father, he also took a swipe at the media, joking, "I'd like to thank the press. Just kidding."The Trump brothers were joined on stage by their half-sister Tiffany and their wives for the ribbon cutting ceremony.