[foobarian]

Many countries institute bans on any political speech at all leading up to elections. I'm not sure whether this is beneficial or not, it may be well intended for all I know, but it would be very hard to justify in the United States due to the constitutional framework.

[fuzzbazz]

In the democratic ones it's just a ban on campaign ads and opinion polls for the 24-48h before an election and on the election day.