The "Unionists" were successful in the elections of 1851 and 1852. Passage of the Kansas-Nebraska Bill and uncertainty about agitation against slavery led the State Democratic convention of 1856 to revive the "Alabama Platform". When the Democratic National Convention at Charleston, South Carolina, failed to approve the "Alabama Platform" in 1860, the Alabama delegates, followed by those of the other "cotton states", withdrew. Upon the election of Abraham Lincoln, Governor Andrew B. Moore, as previously instructed by the legislature, called a state convention. Many prominent men had opposed secession. In North Alabama, there was an attempt to organize a neutral state to be called Nickajack. With President Lincoln's call to arms in April 1861, most opposition to secession ended.