The barely clothed busker, real name Robert Burck, found a chilly reception when he arrived around 2 p.m. at City Hall Park, where hundreds of demonstrators have vowed to dig in unless the next budget includes a $1 billion funding cut to the NYPD. “Very nice meeting you!” Burck called to the throngs while strumming his guitar and walking off down Chambers Street. “Get the ---- up outta here!” yelled one less-than-amused protester who followed him to make sure he got the hell out of Dodge. “We’re gonna make sure y’all leave!” “You supported Donald Trump,” another demonstrator could be...