Jackson and many Politicians resort to this tactic, which involves insulting an opponent and trying to mess up their reputation.

Mudslinging.

Explanation:

The term 'mudslinging' simply refers to the act of spreading negative and malicious information about an opponent to defile his/her reputation. Mudslinging, also known as negative campaigning, is a common practice in politics.

Political parties and politicians often mudslings or make negative campaigns about their opponents to damage their reputation and position in the political arena. This act usually consists of making insults, scandalous remarks, fostering rumours, etc about the opponent parties.