Actors Robert De Niro, Sally Field and Mark Ruffalo joined hundreds of other people outside a Donald Trump building on Thursday for a pre-inauguration demonstration organizers said was meant to energize those concerned about the Republican president-elect’s policies. The event, staged in front of Trump International Hotel and Tower near Central Park in Manhattan, was a rally for city residents who have vowed to pursue their own policies on health care, the environment and other issues during the Trump administration.