Two years later, Frick and Chartran collaborated again on another shrewd commission during the McKinley administration. Chartran painted a scene commemorating the 1898 signing of the peace protocol between Spain and the United States which had ended the Spanish-American War. This event had originally been commemorated by official White House photographer Frances Benjamin Johnston, who was the only female photographer in Washington, DC when she established her studio a few years earlier. Chartran’s 1899 portrait parted company with Johnston’s photograph by repositioning the group, reducing the number of people in view, and emphasizing President McKinley’s prominence.
https://www.thefrickpittsburgh.org/Story-The-Art-of-Politics-and-the-Politics-of-Art-Part-Two