Many characters in "1776" differ from their historical counterparts. Central to the drama is the depiction of John Adams as "obnoxious and disliked." According to biographer David McCullough, Adams was one of the most respected members of Congress in 1776. Adams's often-quoted description of himself in Congress as "obnoxious, suspected, and unpopular" is from a letter written 46 years later in 1822, after his unpopular presidency had likely colored his view of the past. According to McCullough, no delegate described Adams as obnoxious in 1776. Historian Garry Wills earlier made a similar argument, writing that "historians relay John Adams's memories without sufficient skepticism", and that it was Dickinson, not Adams, who was advocating an unpopular position in 1776.