Lobbyists and donations. Lobbyists set the stage for campaign financing. Reelection campaigns are so expensive, politicians start raising money as soon they take office. High cost of TV advertising. Fundraising never stops.
Studies show campaign donations sway votes.
Consultants tell candidates how to talk, what to wear, how to stand, what to say, etc. Propaganda is taken from the Latin word propagane, referring to a gardener's practice of putting fresh roots in the earth to reproduce new plants. The Catholic church established the College of Propaganda in 1622 to propagate the Christian religion. Persuasion is propaganda Communication of information is education. Some crossover either way.