Butler' author Salena Zito joins the ‘Brian Kilmeade Show’ to reflect on the attempted assassination of President Donald Trump in Butler, Pennsylvania, nearly one year later, and the phone call she received from Trump shortly after.

Violence isn't new to the nation's politics, of course. Four presidents have been assassinated in office − Abraham Lincoln and James Garfield in the 19th century and William McKinley and John F. Kennedy in the 20th − and every modern president has been the target of serious assassination plots.