Final answer:
Lobbyists, interest groups, corporations, and constituents are known to influence legislators. Lobbyists, representing various interests, often provide lawmakers with 'voting cues' and may assist in drafting legislation, while Political Action Committees exert electoral pressure with aggregated funds. Ultimately, constituencies hold significant sway as legislators are accountable to their voters.
Step-by-step explanation:
There are several groups and individuals that typically influence or pressure legislators to act in certain ways. Notable among these influencers are lobbyists, who often work on behalf of interest groups, various corporations, and of course, the legislators' own constituents. These entities and people exert their influence through various methods, such as direct and indirect lobbying, electioneering (supporting candidates who align with their interests), and through media campaigns.
Lobbyists and interest groups, using their expertise and informational resources, can be very influential especially in setting the legislative agenda—sometimes going as far as drafting legislation for lawmakers. One noteworthy aspect of the lobbyists' influence comes through what is referred to as 'voting cues,' guiding legislators on how to vote based on fellow lawmakers' stands and constituents' perceptions, particularly on complex issues.
While arguments exist regarding which group is the most influential, given the potential for resource imbalances, one could argue that lobbyists and Political Action Committees (PACs), due to their ability to aggregate funds and exert electoral pressure, potentially have a significant impact on legislators' decisions. However, it's also important to consider the power of constituents, as ultimately, lawmakers are accountable to the voters who elect them.