Joe Biden finally has decided to run for the 2020 Democratic presidential nomination. His name recognition alone makes him the front-runner in a very crowded, very young and very diverse field of declared candidates. But will his decades-long, largely centrist record in the Senate fly in a party that’s moving farther to the left? And how about his problems regarding the #metoo movement and the Anita Hill hearings? Will his age matter? Stay tuned.