Joe Biden will make his first big public speech since leaving the presidency in Chicago on Tuesday. The speech will focus on protecting Social Security, as many Democrats stage a national day of action against feared cuts to the program. Biden has been mostly at home in Delaware since leaving office, reconnecting with family and friends. He has been putting together thoughts for a book and having intense conversations with freed Israeli hostages and families of others. Biden has yet to begin fundraising for his presidential library and is still working on a mission statement and board of directors for his foundation.