As I recall, TrueBrit, the US had a variation of that rule at one time. Not TOO many years ago, all electioneering - on television and radio- had to end the day before.

About the only such rule now is that on election day no one can campaign within 200 yards (I think it is) of any polling place, nor can a person wear a candidate's button or hat or carry any other campaign material into a polling place.