WASHINGTON — Attorneys for President Joe Biden and the special counsel appointed to investigate his handling of classified documents have been negotiating for about a month over the terms under which he would be interviewed, two people familiar with the matter said. Most of the classified documents discovered in November and this year were related to Biden’s time as vice president, according to his attorneys, though some also pertained to his time as a U.S. senator. The documents were found in an office Biden used after he left the vice presidency and at his home in Wilmington, Delaware. Former Vice President Mike Pence, also a presidential candidate, found classified documents from his time in office at his home in Indiana, as well. Garland did not appoint a special counsel for Pence; the Justice Department cleared him of any potential wrongdoing.