Federal law explicitly prohibits the presence of armed officers or federal troops at polling places during elections.

True: Some Trump administration officials have suggested sending armed officers to polling places during the midterms. Also true: Federal law prohibits federal troops or armed officers from being stationed at polling places during an election. https://theconversation.com/what-the-law-says-about-armed-officers-at-polling-places-293150

What the law says about armed officials at polling places Federal law directly prohibits federal troops or armed officers, including federal law enforcement agents, from appearing at polling places during an election. Other federal laws, which more broadly prohibit any intimidation of, or interference with, voters may also be applied to keep armed officials from appearing at polling places. Despite these clear restrictions, some federal officials have suggested publicly that they still may deploy armed federal officials to polling places during the upcoming midterm elections. For that reason, it is important to remember that state laws also likely prohibit armed officials from appearing at polling places. The specific law in each state varies, but all states have some restrictions on behavior at or near polling locations that are intended to ensure that voters can cast a ballot free from intimidation https://theconversation.com/what-the-law-says-about-armed-officers-at-polling-places-293150