When conducting political campaigns, selectively quoting the opponent's speech can effectively influence public opinion. This can be achieved mainly in the following ways: 1. **Selective quoting**: Only quoting the most easily interpreted negative part of the opponent's speech, ignoring its positive or neutral content. This selective quoting can strengthen the opponent's negative image on a specific issue. 2. **Quoting out of context**: Quoting the opponent's speech out of context, presenting a wrong or biased meaning. This method can make the public misunderstand the opponent's true position and make it lose political support. 3. **Provide contrast**: Contrast some of the opponent's remarks with your own position, emphasize the contradictions and inconsistencies of the opponent's remarks, and thus question the opponent's credibility. 4. **Emotional appeal**: By quoting remarks that have a greater emotional impact, the public can resonate emotionally, thereby influencing their cognition and attitude. 5. **Repeated emphasis**: Frequently quoting the opponent's negative remarks in propaganda materials and media, using the repetition effect to make these remarks deeply rooted in the hearts of the people and enhance the public's memory of these information. 6. **Contextual manipulation**: When quoting, important contextual information is deliberately omitted, resulting in the public not being able to fully understand the opponent's position, thus forming misunderstandings. 7. **Social media communication**: Using the communication characteristics of social media, these selective quotations are quickly spread, increasing their exposure and forming public opinion pressure. Through the above methods, political campaigns can effectively shape the public's negative impression of their opponents, thereby winning support for their own side. However, this behavior may also cause controversy and even backlash, so it should be used with caution.