Final answer:
The phrase 'Rum, Romanism, and Rebellion' had political significance in the late 19th century in the United States and was used to criticize the Democratic Party.
Step-by-step explanation:
The phrase 'Rum, Romanism, and Rebellion' has political significance and refers to the political climate in the late 19th century in the United States. It was used during the 1884 presidential campaign to criticize the Democratic Party. 'Rum' referred to the perception of Democrats supporting alcohol consumption, 'Romanism' referred to the Catholic Church's influence on politics, and 'Rebellion' referred to the belief that Democrats supported states' rights and secession. This phrase highlights the religious and political tensions that existed during that time.