Propaganda used by political campaign
Politics
Propaganda has become more common in political contexts, in particular, to refer to certain efforts sponsored by governments, political groups, but also often covert interests. In the early 20th century, propaganda was exemplified in the form of party slogans. Propaganda also has much in common with public information campaigns by governments, which are intended to encourage or discourage certain forms of behavior (such as wearing seat belts, not smoking, not littering, and so forth). Again, the emphasis is more political in propaganda. Propaganda can take the form of leaflets, posters, TV, and radio broadcasts and can also extend to any other medium. In the case of the United States, there is also an important legal (imposed by law) distinction between advertising (a type of overt propaganda) and what the Government Accountability Office (GAO), an arm of the United States Congress, refers to as "covert propaganda".
Roderick Hindery argues that propaganda exists on the political left, and right, and in mainstream centrist parties. Hindery further argues that debates about most social issues can be productively revisited in the context of asking "what is or is not propaganda?" Not to be overlooked is the link between propaganda, indoctrination, and terrorism/counterterrorism. He argues that threats to destroy are often as socially disruptive as physical devastation itself.
Since 9/11 and the appearance of greater media fluidity, propaganda institutions, practices and legal frameworks have been evolving in the US and Britain. Briant shows how this included expansion and integration of the apparatus cross-government and details attempts to coordinate the forms of propaganda for foreign and domestic audiences, with new efforts in strategic communication. These were subject to contestation within the US Government, resisted by Pentagon Public Affairs and critiqued by some scholars. The National Defense Authorization Act for Fiscal Year 2013 (section 1078 (a)) amended the US Information and Educational Exchange Act of 1948 (popularly referred to as the Smith-Mundt Act) and the Foreign Relations Authorization Act of 1987, allowing for materials produced by the State Department and the Broadcasting Board of Governors (BBG) to be released within U.S. borders for the Archivist of the United States. The Smith-Mundt Act, as amended, provided that "the Secretary and the Broadcasting Board of Governors shall make available to the Archivist of the United States, for domestic distribution, motion pictures, films, videotapes, and other material 12 years after the initial dissemination of the material abroad (...) Nothing in this section shall be construed to prohibit the Department of State or the Broadcasting Board of Governors from engaging in any medium or form of communication, either directly or indirectly, because a United States domestic audience is or may be thereby exposed to program material, or based on a presumption of such exposure." Public concerns were raised upon passage due to the relaxation of prohibitions of domestic propaganda in the United States.In the wake of this, the internet has become a prolific method of distributing political propaganda, benefiting from an evolution in coding called bots. Software agents or bots can be used for many things, including populating social media with automated messages and posts with a range of sophistication. During the 2016 U.S. election a cyber-strategy was implemented using bots to direct US voters to Russian political news and information sources, and to spread politically motivated rumors and false news stories. At this point it is considered commonplace contemporary political strategy around the world to implement bots in achieving political goals.Techniques
Common media for transmitting propaganda messages include news reports, government reports, historical revision, junk science, books, leaflets, movies, radio, television, and posters. Some propaganda campaigns follow a strategic transmission pattern to indoctrinate the target group. This may begin with a simple transmission, such as a leaflet or advertisement dropped from a plane or an advertisement. Generally, these messages will contain directions on how to obtain more information, via a website, hotline, radio program, etc. (as it is seen also for selling purposes among other goals). The strategy intends to initiate the individual from information recipient to information seeker through reinforcement, and then from information seeker to opinion leader through indoctrination.A number of techniques based in social psychological research are used to generate propaganda. Many of these same techniques can be found under logical fallacies, since propagandists use arguments that, while sometimes convincing, are not necessarily valid.
Some time has been spent analyzing the means by which the propaganda messages are transmitted. That work is important but it is clear that information dissemination strategies become propaganda strategies only when coupled with propagandistic messages. Identifying these messages is a necessary prerequisite to study the methods by which those messages are spread. 
Propaganda can also be turned on its makers. For example, postage stamps have frequently been tools for government advertising, such as North Korea's extensive issues. The presence of Stalin on numerous Soviet stamps is another example. In Nazi Germany, Hitler frequently appeared on postage stamps in Germany and some of the occupied nations. A British program to parody these, and other Nazi-inspired stamps, involved airdropping them into Germany on letters containing anti-Nazi literature.In 2018 a scandal broke in which the journalist Carole Cadwalladr, several whistleblowers and the academic Dr Emma Briant revealed advances in digital propaganda techniques showing that online human intelligence techniques used in psychological warfare had been coupled with psychological profiling using illegally obtained social media data for political campaigns in the United States in 2016 to aid Donald Trump by the firm Cambridge Analytica. The company initially denied breaking laws but later admitted breaking UK law, the scandal provoking a worldwide debate on acceptable use of data for propaganda and influence.