A senior Clinton campaign aide told BuzzFeed News Biden's approach to addressing the tape reflected a "Mad Men-era mentality."
Jared Kushner was unfazed by the audio recording in which Donald Trump could be heard bragging about grabbing women's genitals without consent.
Hillary Clinton was responding to remarks Barr made during a congressional hearing earlier defending his handling of the Russia probe.
Hillary Clinton previously met with Democratic presidential hopefuls, including Sens. Elizabeth Warren of Massachusetts and Cory Booker of New Jersey.
"I hope I'm the nominee, but if I'm not I'll work with that nominee," Sanders said. "Trump has got be be defeated."