George Brown Tindall and David E. Shi, eds., America: A Narrative History, 5th ed., vol. 1 (New York: W. W. Norton and Company, 1999), 705-706.
Just before Buchanan's inauguration the proslavery legislature called for an election of delegates to a constitutional convention. Since no provision was made for a referendum on the constitution, however, the governor vetoed the measure and the legislature overrode his veto. The Kansas governor resigned on the day Buchanan took office, and the new president replaced him with Robert J. Walker. A native Pennsylvanian who had made a political career in Mississippi and a former member of Polk's cabinet, Walker had greater prestige than his predecessors, and like contemporaries such as Houston of Texas, Foote of Mississippi, and Benton of Missouri, put the Union about slavery. In Kansas he scented a chance to advance the cause of both the Union and his party. Under popular sovereignty, fair elections would produce a state that would be both free and Democratic. Walker arrived in 1857, and with Buchanan's approval, pledged to the free-state elements that the new constitution would be submitted to a fair vote. But in spite of his pleas, he arrived too late to persuade free-state men to vote for convention delegates in elections they were sure had been rigged against them. Later, however, Walker did persuade the free-state leaders to vote in the election of a new territorial legislature.