Final answer:
The Jacksonian Era, starting with Jackson's election, introduced mass-based party politics and the spoils system.
Explanation:
The era that started when Jackson was elected is referred to as the Jacksonian Era. This period, also known as the Jacksonian Democracy era, marked a time of mass-based party politics, high voter turnouts, and the origin of the spoils system. During this era, political patronage, where party loyalty was rewarded with jobs and favors, became a prominent practice.
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