While a specific politician might not be able to promote themselves as a candidate in schools, the majority ruling party in a state heavily influences curriculums. State legislatures vote on curriculum and it affects every topic. In k-12 education, specific topics must be taught in a certain way. History and science are particularly affected. In state universities, state funding often influences hiring decisions, leading professors to conduct work in the interest of the ruling party.

This is such a broad and complex topic, it’s hard to know where to begin. What sort of narratives do you mean? A general pro-USA narrative, or narratives that are pushed by one political party more than the other? It’s important to remember that we have two major political parties in the United States, and the politics in each state can be quite different, depending on which party is in power. Generally, education standards are very similar across the US, but in recent years there are some exceptions where a state’s politics are more clearly visible in school curriculum (the subjects and books taught in school). The most notable example is the state of Florida and the current Governor, Ron DeSantis. He is a member of the Republican Party, which is the more conservative of the two parties in the US. In most states, the Governor does not take such a prominent role in education policy, but DeSantis chose to make it one of his signature issues. There are numerous articles online about the conservative changes he is making to school curriculum. Here are just a few: https://www.vox.com/policy-and-politics/23593369/ron-desantis-florida-schools-higher-education-woke https://apnews.com/article/ron-desantis-education-gop-debate-723e18d19912b97696f3ad2c9d77e099 https://www.csmonitor.com/USA/Education/2023/0321/How-much-say-does-a-governor-have-over-the-classroom

In the US, generally, politicians don't promote narratives in schools. Special interest groups are much more powerful and relevant than individual politicians in the US. If political or cultural ideologies are promoted in schools, it will usually be propagated through the university system, professors, and education departments. Generally, the views held by those who work in universities are quite different than those held by the vast majority of the population. As all teachers are trained in universities and certified by educational departments/state certifying bodies, this then subtly works its way down to classrooms. I have been out of school for a long while, however, so I can't answer on the current state of this. In the US, we have separation of church and state, so religiously valenced topics in schools are generally forbidden. The Federal government funds the majority of the K-12 education system, so they can create certain incentives within the school systems, however. Generally, any government will promote educational programs, specifically with regard to history, that will paint it in a good light. The US is diverse culturally, especially with regard to geography. The cultural views of teachers will usually be somewhat representative of the location in which they teach. However, teachers generally will be highly predisposed to one particular political party. Teachers in the US are often members of unions, so these teacher's unions represent a significant amount of voting capital that certain political parties will cater to, i.e. teachers themselves are a special interest group. Similarly, many state workers are also members of large unions. So, generally, state employees and teachers will generally be more predisposed to a certain political party. This political bias may influence how they teach and vote, generally.

In the United States, there is often a class in "citizenship education" or "civics." The subject matter is not directly political. Typical topics will be "how a bill becomes a law," "how is the Constitution amended," "why does every state have two Senators but different numbers of Representatives," "which amendment gave women the right to vote," etc. I remember my civics teacher giving us his own mnemonic to remember the contents of the Bill of Rights: "From many scenes near Christmas, rosy Santas beam personal smiles." The "F" stood for "four freedoms: freedom of speech, freedom of religion, freedom of the press, freedom of assembly." I think the "M" stood for "militia." And so on.

In the United States, there is a reasonably sincere effort to keep politics out of schools. Students will not be exposed directly to politicians "promoting their narratives." The words of the US President will not be presented in classrooms as something that everybody should agree with and believe. It creeps in, in a subtle way, in history textbooks, and in individual state standards for the teaching of history. For example, consider the question: "was the American Civil war fought primarily over the issue of slavery?" Interpretations of history often have relevance to present-day politics. History textbooks and official curricula can't avoid taking a position. The positions tend to be bland and neutral.