When is the last Liberal Democrat to become a Prime Minister?
No liberal democrat in the party's form today has ever been Prime Minister, what's that got to do with anything? You were talking about representation in Parliament and 'moving towards' a two-party system - 'third' parties (i.e., not Labour or Conservatives) currently hold 103 seats in Parliament, 16% of the total, and an increase on the last election. Can you claim such representation in Congress in living memory? Across both houses of Congress, accordign to Wikipedia there are currently just 2 people who don't have a 'D' or an 'R' after their name.
Actually, when was the last time in the UK that a Prime Minister had a minority government and had to form a coalition to stay in power?
1945, under Churchill.
It's felt like every time recently that a Prime Minister has ruled, his (or her) party has held the majority in the House of Commons. But I could be remembering that wrong.
It is usual, elections are usually a lot more decisive here than in the US, the vote usually strongly favours one party nationwide (we have a lot more of what the US term 'swing' voters). However, a coalition government is at least possible at the next election. The Civil Service certainly beleive it is, and are reportedly making plans for the possiblity of a Labour/Lib Dem coalition govt.
Two points. One, Congress can override the President's veto with a 2/3 majority so, if it's an important, they can do it. But the idea is that Congress could make a rash decision and it's nice to have someone separate and impartial who could say whether or not the bill they pass is a good one.
So one man gets to decide whether the majority opinion of over 500 people is right or wrong based on his own whim? And then requires a supermajority to override that whim? And you're saying this is a more sensible and democratic system than ours?
Second, there are how things are done now and how things have to be done. MPs often break with their party if they think things are wrong, but they don't have to. If they don't, there's no real way to stop them (that's true in the states as well, but you need to control the House, the Senate, and the Presidency in order to do this and, with elections held so often, people can change things more directly much faster). That's the point of checks. It's nice to talk about how things do work, but there's also no reason why they might not work differently tomorrow.
I don't really understand your point here. A minute ago you said 'legislators vote as individuals, not as a party' and now you're worried about them voting as a party, so you need someone to tell them that's wrong?

That's part of my point. The House of Lords is used as an argument for a check on power of Parliament, but there's no reason it has to be. Once again, Parliament could, one day, decide they don't want to listen to the House of Lords. There's nothing the House of Lords could do, is there? There's nothing limiting Parliament.
Well they have to invoke the Parliament Act to bypass the Lords' rejection of a bill, but no, officially there's nothing the Lords' can do to stop them doing it in the political sphere (Some of the Lords are involved in the judiciary, which will review the legality of the bill, but thats a different matter). So what? Their function (these days) is to serve as a long-serving advisory balance on election-obsessive politicians, not to replace the duly elected government.
This was most recently demonstrated in the 42-day detention debacle. The Lords rejected the bill and sent it back to the Commons where the Government accepted that it was defeated in its current form. Thus you have a situation where the ultimate power still lies with the majority verdict of a democratically elected Commons, not with 'vetos' of individuals, but there is still a balancing, advisory group, free from the pressures of re-election , who can say "Are you sure that's the best idea?".
Well, the Queen has official powers. She dissolves Parliament, she appoints the Prime Minister, she calls for elections. But she does exactly what the respective parties that actually make the decisions tell her to do. In theory, she could do otherwise as well (but, in this case, she'd probably just be ignored).
Well as someone's said already, she exists still by Parliament's grace, whatever the books say. A simple majority vote in Parliament could remove the monarchy forever, if they wanted to.The Queen's primary role in government (tehr than the ceremonial stuff) is similar to the Lords, in that she acts as an unofficial advisor to the PM - she has held regular private meetigns with every PM since she took the throne, and many have spoken at length of the invaluable nature of her advice.
Members of the House of Representatives are elected every 2 years. They are directly beholden to the people they have to represent and they have a much shorter time to abuse power. The President has 2 four year terms and has to stand for election at these times, not when it's politically best for him. Senators serve 6-year terms but about a 1/3 are up for reelection every 2 years.
So the legislature is held accountable every 2 years, not every 5 like the House of Commons.
Which is probably why your voter apathy is one of the highest in the Western world. Furthermore, repeated elections are not the best way, imho, to acheive a legislature who are actually interested in doing the job for the good of their area and country, rather than thinking about elections all the time. With terms of jsut 2 years, you've barely finished an election when you have to think about the next one. And politicians in the throws of electoral cycles don't tend to be the most switched on politicians when it comes to making tough but necessary decisions which may make them unpopular with funding sources.
The Presidency gets twice that time, but, if he's unpopular, he'll find it difficult to govern after 2 years if he doesn't have the support of the legislature (the President's actual role is much more limited than that of the Prime Minister, he's just able to exercise these duties with or without support of the legislature as a separately elected representative of the people).
While the PM, regardless fo his role, has no more voting power than Joe Bloggs MP from Aberforth West - I like that. However much in the public eye his decisions and his views are, he has the same vote as any other MP. His role is actually primarily a party one - he acts as a figurehead for the party in power. If he loses support, he tends to not just find it "harder to govern", he tends to lose his job.