In a December 1857 meeting with Stephen Douglas, the chairman of the Senate Committee on Territories, Buchanan demanded that all Democrats support the administration's position of admitting Kansas under the Lecompton Constitution. On February 2, he transmitted the Lecompton Constitution to Congress. He also transmitted a message that attacked the "revolutionary government" in Topeka, conflating them with the Mormons in Utah. Buchanan made every effort to secure congressional approval, offering favors, patronage appointments, and even cash for votes. The Lecompton Constitution won the approval of the Senate in March, but a combination of Know-Nothings, Republicans, and northern Democrats defeated the bill in the House. Rather than accepting defeat, Buchanan backed the 1858 English Bill, which offered Kansans immediate statehood and vast public lands in exchange for accepting the Lecompton Constitution. In August 1858, Kansans by referendum strongly rejected the Lecompton Constitution.[67]
The dispute over Kansas became the battlefront for control of the Democratic Party. On one side were Buchanan, most Southern Democrats, and the "doughfaces". On the other side were Douglas and most northern Democrats plus a few Southerners. 