[87] After seven ballots, the convention remained deadlocked: Cass could not attract the support necessary to reach two-thirds, and Van Buren's supporters were more and more discouraged about the former president's chances. Delegates were ready to consider a new candidate who might break the stalemate.[88]
When the convention adjourned after the seventh ballot, Pillow, who had been waiting for an opportunity to press Polk's name, conferred with George Bancroft of Massachusetts, a politician and historian who was a longtime Polk correspondent, and who had planned to nominate Polk for vice president. Bancroft had supported Van Buren's candidacy and was willing to see New York Senator Silas Wright head the ticket, but Wright would not consider taking a nomination that Van Buren wanted. Pillow and Bancroft decided if Polk were nominated for president, Wright might accept the second spot. Before the eighth ballot, former Attorney General Benjamin F. Butler, head of the New York delegation, read a pre-written letter from Van Buren to be used if he could not be nominated, withdrawing in Wright's favor. 