Joe Biden marks a milestone on Sunday that no other president has achieved while in office: He turns 80. Bidenwill be the first octogenarian-in-chief, a historical record that neither he nor the White House has been all that eager to publicize as Biden weighs the possibility of running for a second term. "I can't even say the age I am going to be. I can't even get it out of my mouth," Biden joked late last month in an interview with MSNBC. First lady Jill Biden is hosting a Sunday brunch for the president and other family members to celebrate his birthday, the White House said. Visit the link in @usatoday’s bio for more on Biden’s life.