Simplify the following text for a Grade 16 native English-speaking person.
Original: He later ran for mayor and governor and even sought the presidential nomination , but lost much of his personal prestige when outrage exploded in 1901 after columnist Ambrose Bierce and editor Arthur Brisbane published separate columns months apart that suggested the assassination of William McKinley .
Simplified: He later ran for mayor and governor and even tried to get nominated for president , but his reputation was hurt in 1901 after columnist Ambrose Bierce and editor Arthur Brisbane published separate columns months apart that suggested that President William McKinley be assassinated .