I'd say because the GOP cannot whip its members or govern as effectively as the Democrats. The reality here is that a handful of Republicans in the house either didn't vote or voted no. The Dems were holding out due to things like the Big Beautiful Bill stripping away ACA subsidies and what not. And, since the Dems are in the minority, the fact the GOP needed their help to get it to the senate is kind of sad.
I'm not sure what you are describing.
The Big Beautiful Bill didn't have any Democratic Senators support the bill. It's hard for even Americans to understand the rules and procedures of the Senate. Generally, if there is a difficult vote it's because the filibuster can be utilized by the minority party. Ergo, the October shutdown over appropriations legislation.
I have a different point of view about members of Congress voting apart from their party majority. It's a healthy act that many times allows Congressional members from purple states/districts to act as a voice of moderation. The idealism of a unified Democratic caucus is certainly something one might see as a positive force. So much so, we have had many members criticize the likes of Fetterman and previously Manchin and Sinema who periodically broke Democratic ranks.
A beautiful, compassionate thought on this from you below:
Yeah, ever since he had his stroke, he's become more right-wing. I guess it has something to do with brain damage...
Canadians often get confused by our legislative process. It is specifically designed to make passing legislation difficult. One could question the wisdom and practicality of that, but that's how it works. Our forefathers didn't foresee the hardened postures of our political parties that exists today. Of course, our Constitution doesn't encode the filibuster. The filibuster is an old, self-imposed Senate procedural rule.
In contrast, it's safe to assume that a contentious bill within the ranks of the Canadian majority party or majority coalition never makes it to the floor of Parliament until a majority is on board. There is floor debate, but I presume the outcome has already been decided.