What were joseph pulitzer and william randolph hearst well known pioneers of?

Engaging in a style of publishing called yellow journalism.

Explanation:

William Randolph Hearst, from the New York Journal and Joseph Pulitzer, from New York World were pioneers of a journalist style that emerged in the late 1800s called yellow journalism. The main characteristics of this type of newspapers were exaggeration, dishonesty and sensationalism. Its goal was to catch people's attention.

popular sovereignty   influenced the declaration of independence because the colonists wanted to have freedom to do they wanted so they put into writing

“i think it is very plausible that if there are five votes to end the death penalty, it could be with the people who are on the court right now,” - smith

so basically it is not clearly and consistently imposed