Final answer:
The Weaker political party between 1860 and 1932 changed over time. Initially, the Whig Party declined after 1852 and was replaced by the Republican Party and the Know-Nothing Party. By the 1920s, the Democratic Party faced significant weakening due to various factors, including shifts in public sentiment.
Step-by-step explanation:
During the period between 1860 and 1932, the American political landscape saw significant changes. The Weaker party during most of this era was the Whig Party, which experienced a major decline and eventually ceased to exist as a national party after the 1852 presidential election.
The Republican Party and the Know-Nothing Party, also known as the American Party, emerged to fill the gap left by the Whigs. By the 1920s, the Democrats also faced challenges, the Democratic Party weakened significantly during the elections of 1920 due to several factors including the death of progressive leaders and shifts in public sentiment towards reform.