How can Pressure Groups and Lobbyists influence Voting Behaviour within Congress

-PGs can influence Politicians via Persuasion and mobilizing Key Groups to Support/Oppose a Candidate -PGs can provide essential Funding for a Candidate, in return for Support in their Area. In 2019, a Pro-Gun Group: the National Rifle Association (NRA) raised $350 million. Compared to Gun Control Groups like Everytown for Gun Safety, they raised $100 million -Lobbyists can be influential too due to Connections with Politicians in Congress, and luring the Congressional Person into an attractive role within the Lobbying Firm, after they leave office. In 2022: 453 former members of Congress was working in a Lobbying Capacity as Advisors or Lobbyists