ABC News reports:

Of two potential Democratic successors to Barack Obama, one has a clear advantage in personal popularity: Hillary Clinton, whose favorability rating exceeds Joe Biden’s by a hefty 19 percentage points in the latest ABC News/Washington Post poll.

Clinton, set to testify before Congress today about the Benghazi attack, appears undamaged by the security failure that led to the death of the U.S. ambassador to Libya: Sixty-seven percent of Americans see her favorably overall, numerically a new high in her long career in the public spotlight, and essentially unchanged in recent months.