Propaganda looks plural but is not. Billiards, bowls, darts and fives are also singular. Law and order, like hue and cry and a ham and cheese, are really singular concepts and take singular verbs.
Meanwhile media are plural. So are whereabouts and headquarters. Teams that take the name of a town, country or university are plural, even when they look singular: England were bowled out for 56.
See also data, which can be both singular and plural.
Prefer the singular when referring to chemical (not chemicals) companies, drug (not drugs) traffickers, pension (not pensions) systems and so on. But arms-trader, drinks group, groundsman and sales force
Do not assume that all voting is done in elections in the plural. If, as in the United States, several votes (for the presidency, the Senate, the House of Representatives, etc) are held on the same day, it is correct to talk about elections. The European Parliament’s elections should also be plural. But in, say, Britain parliamentary polls are usually held on their own, in a single general election.
The opposition demanded an election is often preferable to The opposition demanded fresh elections. And to write The next presidential elections are due in 2025 suggests there will be more than one presidential poll in that year.