After completing his education, Phillips worked as a newspaper reporter in Cincinnati, Ohio, before moving on to New York City where he was employed as a reporter for The Sun from 1890 to 1893, then columnist and editor with the New York World until 1902.
In his spare time, he wrote a novel, The Great God Success, that was published in 1901.
 The royalty income enabled him to work as a freelance journalist while continuing to write fiction.
Writing articles for various prominent magazines, he began to develop a reputation as a competent investigative journalist.
Phillips' novels often commented on social issues of the day and frequently chronicled events based on his real-life journalistic experiences.
 He was considered a Progressive and for exposing corruption in the Senate he was labelled a muckraker.

Phillips wrote an article in Cosmopolitan in March 1906, called "The Treason of the Senate," exposing campaign contributors being rewarded by certain members of the U. S. Senate.
The story launched a scathing attack on Rhode Island senator Nelson W. Aldrich, and brought Phillips a great deal of national exposure.
This and other similar articles helped lead to the passage of the Seventeenth Amendment to the United States Constitution, initiating popular instead of state-legislature election of U. S. senators.

David Graham Phillips is known for producing one of the most important investigations exposing details of the corruption by big businesses of the Senate, in particular, by the Standard Oil Company.
 He was among a few other writers during that time that helped prompt President Theodore Roosevelt to use the term “Muckrakers”.

 The article inspired journalist Charles Edward Russell to insist to his boss William Randolph Hearst, who had just recently purchased the Cosmopolitan magazine, that he push his journalists to explore the Senate corruption as well.
Philips was offered the position to explore more information about the corruption and bring it into the public’s eye.
Philips’ brother Harrison and Gustavus Myers were hired as research assistants for Philips.
Hearst commented to his readers about Philips starting a series that would reveal the Senate corruption so much, that most Senators would resign.
This held true for some of the Senators, such as New York Senators Chauncey M. Depew and Thomas Collier Platt.
Philips exposed Depew as receiving more than $50,000 from several companies.
He also helped educate the public on how the senators were selected and that it was held in the hands of a few bosses in a tight circle, helping increase the corruption level.
As a result of these articles, only four of the twenty-one senators that Philips wrote about were still in office.
Philips also  had some of the greatest success  as a muckraker, because he helped change the U.S. Constitution, with the passage of the 17th Amendment, creating popular election for senators.

His talent for writing was not the only thing that helped him stand out in the newsroom.
Philips was known to dress in a white suit with a large chrysanthemum in his lapel.
After completing his education, Phillips worked as a newspaper reporter in Cincinnati, Ohio, before moving on to New York City where he was employed as a reporter for The Sun from 1890 to 1893, then columnist and editor with the New York World until 1902. In his spare time, he wrote a novel, The Great God Success, that was published in 1901.  The royalty income enabled him to work as a freelance journalist while continuing to write fiction. Writing articles for various prominent magazines, he began to develop a reputation as a competent investigative journalist. Phillips' novels often commented on social issues of the day and frequently chronicled events based on his real-life journalistic experiences.  He was considered a Progressive and for exposing corruption in the Senate he was labelled a muckraker.
Phillips wrote an article in Cosmopolitan in March 1906, called "The Treason of the Senate," exposing campaign contributors being rewarded by certain members of the U. S. Senate. The story launched a scathing attack on Rhode Island senator Nelson W. Aldrich, and brought Phillips a great deal of national exposure. This and other similar articles helped lead to the passage of the Seventeenth Amendment to the United States Constitution, initiating popular instead of state-legislature election of U. S. senators.
David Graham Phillips is known for producing one of the most important investigations exposing details of the corruption by big businesses of the Senate, in particular, by the Standard Oil Company.  He was among a few other writers during that time that helped prompt President Theodore Roosevelt to use the term “Muckrakers”.
 The article inspired journalist Charles Edward Russell to insist to his boss William Randolph Hearst, who had just recently purchased the Cosmopolitan magazine, that he push his journalists to explore the Senate corruption as well. Philips was offered the position to explore more information about the corruption and bring it into the public’s eye. Philips’ brother Harrison and Gustavus Myers were hired as research assistants for Philips. Hearst commented to his readers about Philips starting a series that would reveal the Senate corruption so much, that most Senators would resign. This held true for some of the Senators, such as New York Senators Chauncey M. Depew and Thomas Collier Platt. Philips exposed Depew as receiving more than $50,000 from several companies. He also helped educate the public on how the senators were selected and that it was held in the hands of a few bosses in a tight circle, helping increase the corruption level. As a result of these articles, only four of the twenty-one senators that Philips wrote about were still in office. Philips also  had some of the greatest success  as a muckraker, because he helped change the U.S. Constitution, with the passage of the 17th Amendment, creating popular election for senators.
His talent for writing was not the only thing that helped him stand out in the newsroom. Philips was known to dress in a white suit with a large chrysanthemum in his lapel.
David Graham Phillips