Any idea why? Healthcare announcement maybe?
Read more: Link to source
Due to the arrival of the President of the United States, delays and temporary closures of Pier 11/ Wall St. are possible between 3:00pm and 5:00pm today. We will continue to keep you updated with the latest information and apologize for the inconvenience.
Was on the site for the Women's March. They are specific about the March being for women's rights and that it is not a protest against the President.