And in 2010, Joe Lieberman (D) blocked Obamacare from getting a public option.
It’s not that a party has a 51-man majority, although that helps for simple legislation. It’s that a party has a majority that can withstand defectors. And one further, defectors aren’t always defecting out of malice. Susan Collins (R) resides in a remarkably purple region such that she needed to oppose Trump on some of his policies to ensure she could get re-elected this year (and she did).
I don't think we can say in advance what will and won't be blocked. But on the news today they pointed out that Biden has literally spent decades working in the Senate. So if anyone has across-the-aisle relationships, it would be him.
Anyways, again: we cannot say in advance what's going to happen next.
That is legal? Wow, very sleazy. In Brazil you lose your office if you switch after elected. You can still go against your party when voting, but changing parties after election has got to burn you forever...
I'm not ruling out that possibility now. Especially when the stakes are even higher.