He has communicated his frustration that Mr. Biden's closest advisers are too old and out of touch with the current political climate — urging him to include more younger aides, according to three Democrats with direct knowledge of the discussion.
In March, Mr. Obama took the unusual step of summoning Mr. Biden's top campaign advisers, including the former White House communications director Anita Dunn and Mr. Biden's longtime spokeswoman, Kate Bedingfield, to his Washington office for a briefing on the campaign's digital and communications strategy with members of his own staff, including his senior adviser, Eric Schultz.
When they were done, Mr. Obama offered a pointed reminder, according to two people with knowledge of his comments:
Win or lose, they needed to make sure Mr. Biden did not "embarrass himself" or "damage his legacy" during the campaign.
