(CNN) - John McCain has called Joe Biden to congratulate him on being named Barack Obama's running mate, two GOP sources tell CNN's John King.
It was a "short conversation" and "very pleasant," a McCain aide in Arizona said.
"It was a brief phone call, they've known each other for many years, they are good friends," McCain campaign spokesman Tucker Bounds also said.
McCain communications director Jill Hazelbaker declined to give further details.
"It was a private, personal phone call," she said. "Senator McCain welcomed him into the race."