Which event was the catalyst for the secession of the first seven southern states in 1861

The answer for this question is: the election of Abraham Lincoln as President
Abaraham Lincoln was always known as someone that really see slavery as something that undermines human's value.
Not long after elected as president, Abraham Lincoln made several policies that make it harder for the southern states to keep their slaves, which led to the first secession.

Maybe cuz more people are gooing on vacation