What persuasive technique is illustrated by a campaign encouraging people to call Congress about President Bush and Iraq?

The correct answer highlights the "Join the Bandwagon Appeal" as the persuasive technique used in this campaign. This method encourages individuals to take action based on the notion that a large number of others are already participating, thus creating a sense of urgency and social pressure to not be left out.

In the context of the campaign urging people to call Congress regarding President Bush and Iraq, this strategy effectively leverages the idea that many citizens are involved and taking a stand, which can motivate others to join in. The bandwagon effect is a powerful psychological phenomenon where people are influenced by the actions and opinions of others, playing on the desire to fit in or be part of a collective movement. By framing the act of calling Congress as a popular or common action, the campaign taps into the fear of missing out on an important societal issue.

This approach contrasts with other persuasive techniques that focus on different aspects, such as emotionally charged appeals or specific targeted messages that need not rely on group participation. Thus, this campaign’s success hinges on its ability to portray the action as something that many others are undertaking, encouraging others to follow suit and get involved.