When Biden was on the ticket in 2008, he and Senator John McCain, then the Republican nominee, would have off-the-record, back-channel exchanges to smooth the waters. “There’s going to be no phone calls here,” Klain said. “This is going to be a battle to the death. Nothing off-limits. Trump will use every possible tool, legitimate and illegitimate, fair and unfair, true and false to try to destroy you and your family.”

