Many Canadian conservatives like to say they are “socially liberal, economically conservative” because Canada is less socially conservative than the United States. Many members of the federal Conservative Party meet this description, although they have a vocal minority of MPs (Members of Parliament) who are socially conservative as well. These members agitate for abortion legislation, etc, and the leaders of the political party generally have to shut them down. Failure to do so could lose an election.
I’m sure there are socially conservative but economically liberal people like in the Red Wall region of the UK, but I’m not entirely sure where to find such people in Canada. Quebec, maybe?
Primaries: as arcane as in the US, it seems. There’s riding associations that along with “primaries” help determine who gets to run in a particular riding. In practice a party leader can kick someone out of the party and so forbid them from running under their banner. (They can still run as an independent or switch parties.) I don’t believe an American political leader can have that much control over their representatives. Kicking out generally comes up due to a scandal, and routinely in every election a few candidates from each party get kicked out for committing crimes or just being stupid. (The Conservative Party has had to learn how to put down “bozo eruptions”, which it did successfully in the 2011 election and not so successfully in the 2015 election.)
Leadership elections are something like a “primary” as well. These draw more attention, and range from very dull to very exciting and/or controversial. We even saw a romantic relationship break down during one (both significant others ran for the leadership of the Progressive Conservative Party). Who are the PCs? Canadian parties shift, split, rejoin and rebrand a little more often than in the US.
MPs are the equivalent of Congressional Representatives. The leader of the largest party becomes the Prime Minister. (I understand that the leader of a smaller party could become Prime Minister, but this is theoretical, and either hasn’t happened or only happened for a brief period of time.) By contrast, in the US the leader of the House of Representatives (the House Majority leader) is chosen after the election. In essence, picture Nancy Pelosi as Prime Minister, but she would have run as the party leader.
MPs are elected in ridings, our equivalent of Congressional districts. Last election there were 308 of these. Just like in the US, where you can win the Electoral College without winning the popular vote, that can happen in Canada. In fact that happened in our last two elections. Whichever party wins the most seats “wins” the election and sets the agenda. Because Canada is not a two party state, we sometimes end up with “minority governments”, where the party that won a plurality (but less than 50%) of seats becomes the government, the party that won the second largest number of seats becomes the Official Opposition, and third parties hold the balance of power. In the time period between the 2019 and 2021 election, Justin Trudeau of the Liberal Party was Prime Minister, but led a minority government. He did not start a formal coalition with any party (if there was, members of the coalition partner party would have entered his cabinet) but generally allied with Jagmeet Singh’s New Democratic Party (NDP) rather than the Conservative Party or Bloc Quebecois.
Our Cabinet members must all have been elected as MPs first. Well, that’s how it normally works. On occasion, we’ve had a Senator as a Cabinet Minister. I’m not 100% sure how legal this is. It’s generally done if the winning party is completely shut out of a region. This also creates a problem - if you won only one seat in a region, that person is guaranteed to be made a Cabinet Minister, even if they’re incompetent.
Canada obviously doesn’t have a president. We have an equivalent, the Governor General. This is an appointed ceremonial position. Their job is to sign bills and occasionally do some constitutional stuff because we’re only like 99% independent from the UK. (Canada does not reference it’s Constitution nearly as often as the United States does.)
Canada has a Senate which is appointed, not elected. It’s also far less powerful than the US equivalent. It’s job is to take a “sober second look” at legislation and is only rarely capable of stopping legislation. Because it’s appointed and members serve for life, you often have a Senate that does not reflect the winner of the election. That’s rarely any real problem.
Supreme Court members are appointed through a “quiet” process. I doubt most Canadians could name any members of their Supreme Court.
Each province has its political parties that normally align with the federal party. Normally. In British Columbia there is no Conservative Party, instead, their Liberal Party is conservative and it’s a two party province. Alberta’s Liberal Party is almost non-existent, instead left-leaning Albertans vote for the NDP. Quebec’s political situation is very different. People routinely vote for one party at the provincial level but a different party at the federal level (even when all major political parties align). We are more open to vote switching, IMO.