Hari Seldon and penultima thule have already posted, but I’ll chime in as well.
As Hari posted, in Canada, the nomination process is similar for both federal and provincial elections: the party organization in each electoral constituency (we call them “ridings” informally, for historical reasons) is responsible for nominating a candidate. It’s done by a local meeting of party members - literally, “card-carrying members” - that term has meaning here. It’s not open to the public at large. To be a voting member, you have to sign up a certain period before the nomination and pay a membership fee - typically about $10 to $25 dollars.
The vote is run entirely by the riding organization. It’s not tied to the electoral laws of the provincial or federal government, and it’s not run by the provincial or federal electoral officers.
Whoever wins the local nomination is the candidate at the general election, subject to being accepted as a candidate by the party leader, who has to sign off on it.
The reason for this approach is that parties in Canada have a definite ideological framework. They’re not meant to be simply electoral vehicles for individuals to take advantage of, which increasingly seems to be case in the US (from this outsider’s perspective). It’s considered important that parties have some control over the candidates they get, to make sure all of their candidates are roughly of the same ideology and support the same things.
There isn’t the “pre-selection” process which penultima thule mentions for Australia, and which I understand is also common in Britain. Naturally, a candidate wants to get as much support from the local party bigwigs as possible, but as far as I know, every party provides that any party member can be nominated if they get enough signatures from party members. They don’t need the approval of a local committee to stand for the nomination.
And, although incumbency is a big factor, it’s not decisive. Sitting MPs/MLAs can find that they don’t get the nomination. It’s rare, but it does happen: just last month, a sitting MP in Saskatoon was defeated for the nomination. He says he made the mistake of complacency and didn’t do enough local work as MP, opening an opportunity for others to challenge him: Brad Trost loses Tory nomination race in his Saskatoon riding. By Conservative Party rules, he can’t seek a nomination in another riding, but he could run as an independent if he wishes.
Where I disagree, respectfully, with Hari is his comment that it really doesn’t matter who gets the nomination because votes in the Commons are all party line votes. That’s true, but it doesn’t answer the question: who sets the party line? That’s a complicated question, because it’s a mixture of what the party rank-and-file say at party policy conventions; the platform that the party ran on; the views of the individual caucus members; and the views of the PM and Cabinet. Again, you have to remember the stronger ideological component of Canadian parties: because the parties have a clearer ideological identity, they will attract as candidates people who support the ideology of that party.
For example, after a lengthy policy debate internally in the Liberal Party, they came out in favour of marijuana decriminalization. There will be a vote on the bill later this year in the Commons, and you can be sure that every Liberal MP will vote for it. Part of the reason for that is that every Liberal MP, as a candidate in the general election, campaigned for decriminalisation. If they weren’t in favour of it, they wouldn’t have been in the Liberal Party. Yes, the Whip will be on the vote as well, but the details of the bill have already been debated internally in the Liberal caucus and the Cabinet. That occurs behind the scenes, but it doesn’t mean that the Liberal caucus are just dummy votes for the PM. They vote the party line because they’ve been involved in the formation of that party line, and generally support it, although they may have some disagreements on points of detail.
In short, our parliamentary system is much more ideological (in the sense of common origanisting political principles for each party) and more collectivist in approach than is the case in the US.
One other point: the power of the party leader to reject a candidate chosen locally. A party leader uses this power at their peril. There have been cases where the party leader has rejected the candidate chosen by the riding organization and parachuted in a candidate. That often does not work well, as it can alienate the local party organization and they won’t work for the parachute candidate, making it difficult for the parachute candidate to win the riding in the general.
But, the power does have a role: to maintain consistency in all candidates in supporting the party platform. For instance, fifty years ago, the issue of official bilingualism was extremely divisive. The Progressive Conservative party, after a gut-wrenching internal debate, came out in support. And then one riding nominated as their candidate a strong opponent of official bilingualism, challenging the party’s position on it. The leader of the party, Bob Stanfield, refused to sign the nomination papers, because the party had made the decision, as a party, to support official bilingualism. He wasn’t prepared to have that debate re-opened by one of the party candidates in the general election, and was prepared to lose that particular seat rather than have that happen.
That’s what I mean by the parties being both more ideological and more collective in their approach in our parliamentary system. There had been a rancorous internal debate on the party position, but once it was decided by the party, it was expected that all candidates would support it.
Different system than in the US, clearly; YMMV whether you would prefer it or not. (I think pkbites probably would, based on his comments in this thread.)
One other point: the attitude of many US posters in this thread appears to be that the public at large should be involved in choosing party candidates. That’s not the case in Canada. And, that has the effect, it seems to me, of reducing partisanship. By and large, the number of people who are involved in the nomination process is pretty low. Most people don’t identify strongly as supporters of one party or another, and there is no way to tell from their voting records what their party affiliation is, if any, because there is no public vote on nominations, unlike the US primary, where it’s a matter of public record if you voted in the Republican or Democratic primary. That means it’s not as tribal here, in my opinion; again, YMMV.