"The American Republicans of the city and county of Philadelphia, who are determined to support the NATIVE [White, Protestant] AMERICANS in their Constitutional Rights of peaceably assembling to express their opinions on any question of Public Policy, and to SUSTAIN THEM AGAINST THE ASSAULTS OF ALIENS AND FOREIGNERS are requested to assemble on MONDAY AFTERNOON, May 6th, 1844 at 4 o'clock, at the corner of Master and Second street, Kensington [a section of Philadelphia], to express their indignation [anger] at the outrage on Friday evening last, which was perpetrated by the Irish Catholics."Text from a poster announcing a meeting of the American Republican Party, later renamed the American Party, Philadelphia, 1844Historians could best use the excerpt as an example of which of the following?

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