Original sentence: Lincoln's actual position on freeing enslaved African-Americans is controversial today, despite being best remembered for anti-slavery beliefs he expressed during the Lincoln-Douglas Debates of 1858 and his presidency (see Lincoln's First Inaugural)
Edited sentence: Lincoln's actual position on freeing enslaved African-Americans is controversial today, despite the frequency and clarity with which he stated it both before his election to president (i.Lincoln-Douglas Debates of 1858) and after (see Lincoln's First Inaugural)