FILE - In this April 6, 2019, file photo former President Barack Obama gestures as he speaks during a town hall meeting at the 'European School For Management And Technology' (ESMT) in Berlin, Germany. On Saturday, May 16, 2020, Obama plans to speak during “Show Me Your Walk, HBCU Edition,” a two-hour livestreaming event for historically black colleges and universities broadcast on YouTube, Facebook and Twitter. (AP Photo/Michael Sohn, File)

FILE - In this Dec. 12, 2018, file photo former President Barack Obama accepts the Robert F. Kennedy Human Rights Ripple of Hope Award at a ceremony in New York. On Saturday, May 16, 2020, Obama plans to speak during “Show Me Your Walk, HBCU Edition,” a two-hour livestreaming event for historically black colleges and universities broadcast on YouTube, Facebook and Twitter. (AP Photo/Jason DeCrow, File)