It's like watching a pendulum. ;-) The main reason being this: the key way to becoming extremely unpopular, even hated, is to get elected! By one or two years into your term of office the majority of the public will realize you ain't the blessed saviour they hope you were and they will probably hate your guts. That's why you have 2 parties in the USA...so the pendulum process can work itself out in the least compicated way possible.

We have about 5 parties in Canada, so the hatred gets spread around and diffused a lot more here, and is therefore not so violent as in the USA. Nevertheless, I can tell you without a doubt that the party that's been in power for awhile in Canada is normally the most hated party in the country. The public instinctively resents those in power far more than they resent those out of power, because they know darned well that their government is robbing them. This is the case in pretty much every nation. ;-D