With former Mayor Pete Buttigieg and billionaire Tom Steyer dropping out of the Democratic presidential race on Sunday, the youngest male candidate standing is … 77-year-old Joe Biden, The Daily Beast’s Sam Stein points out. Steyer, 62, was at the younger end of the remaining field and Buttigieg, 38, was the young end. The remaining men vying to face 73-year-old President Trump are Sen. Bernie Sanders (I-Vt) and billionaire former Mayor Michael Bloomberg, both 78.