Governments are not limited by the Hatch Act, civil service employees are. And the limitations are mainly around elections, so for example under the Hatch Act a civil service employee may not "use his official authority or influence for the purpose of interfering with or affecting the result of an election", may not "knowingly solicit, accept, or receive a political contribution from any person", may not "run for the nomination or as a candidate for election to a partisan political office", and may not "knowingly solicit or discourage the participation in any political activity" of someone who the civil service employee is interacting with.