An immediate result of lincoln’s election in 1860 was that

One immediate result of Lincoln's election in 1860 was that the seven slave states of the south declared cessation to the Union and formed the Confederate States of America.

Explanation:

With almost no support from the South of the country, Lincoln ran the North and was elected president. His election made seven slave states of the south declare assignment to the Union and form the Confederate States of America. The break with the Southerners made the Lincoln party gain extensive control of Congress, but no action or reconciliation was made.

d.

the northwest territory became the most densely populated area in the u.s.