 Heiskell accused Brownlow of selling out to northerners over the issue of slavery.After four days, with the Convention hopelessly deadlocked, Sam Milligan, a lifelong friend of Johnson, motioned successfully for the Convention to adjourn "sine die", leaving the debate unresolved.Andrew Johnson, who had been serving as Tennessee's military governor since 1862, was elected Vice President of the United States in November 1864 and was elevated to the presidency after Lincoln was assassinated in April 1865.