Be there or be square. President Obama is holding a “Facebook Live” townhall meeting April 20 at 4:45 EST, hosted by Mark Zuckerberg and Facebook COO Sheryl Sandberg. Questions can be submitted here and will be selected prior to the live one-hour event. Facebook played a prominent role in the President’s re-election campaign announcement and Mashable suspects that the RSVP process may be designed to generate White House “likes.”