No. South Carolina seceded on December 20th, 1860, before Lincoln was officially sworn in as President. However, the state did secede as a reaction to Lincoln's election.
When South Carolina seceded, Buchanan was still in the chair, and Lincoln was President-elect.
Abraham Lincoln the south seceded from the union because he was elected president.
The southerners hired a assassin to assassinate president Lincoln.
Lincoln
Abraham Lincoln
The election of Lincoln as President.
3 months
The election of Lincoln in 1860. He would not allow any new slave-states, so the South knew they would always be outvoted in Congress.
As a consequence of Lincoln’s election, a special convention of the South Carolina legislature votes to secede from the Union.
When Abraham Lincoln became president
South Carolina the first southern state to secede on December 20, 1860, and James Buchanan was President, and Abraham Lincoln was the President elect.
Secede from the USA, one by one, starting with South Carolina.