What four groups or individuals who typically influence or pressure legislators

The correct answer to this open question is the following.

The four groups or individuals who typically influence or pressure legislators are Lobbyists, companies, unions, and non-government organizations.

When politicians are on their campaign, they make a lot of promises. The problem when they get to the office is that they have to deliver on their promises. Lobbyists, companies, unions, and non-government organizations put pressure on legislators because they have their own agendas and interest. The legislator has to pat attention to its public image, its reputation, and the next election. So he/she is very careful when it is negotiation with those groups and what appears on social media and the TV news.

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