There's one phrase to clarify former Vice President Joe Biden's huge turnaround from what appeared like a dead-in-the-water presidential marketing campaign only a week in the past.

That phrase is "worry."

Particularly, worry of Sen. Bernie Sanders, the Vermont impartial, successful the Democratic presidential nomination, knocking institution Democrats out of energy, presenting a socialist message to the voters, and handing President Donald Trump a decisive basic election victory.

After Biden's disappointing showings within the Iowa caucuses and the New Hampshire major, a clearly rattled Democratic Occasion institution hit the panic button and determined to coalesce across the man they noticed as probably the most viable various to Sanders.

Thus far, the last-minute endorsements and strain on rival candidates to withdraw from the race...