Chicago, Oct. 23 -- Donald Trump's appearance next week at a police chiefs conference will be his first visit as president to Chicago, a city he has ridiculed for years. The city's top cop plans to skip the speech, even though he's hosting the event.

Police Superintendent Eddie Johnson's apparent snub of Trump's speech Monday at the International Association of Chiefs of Police Conference is the latest chapter in a long and contentious relationship between the Republican president and the nation's third-largest city, a Democratic stronghold.

"The values of the people of Chicago are more important to him than anything that could be discussed at that speech," Johnson's spokesman, Anthony Guglielmi, said shortly after the White House annou...