I think a good revising chamber is critical to good democracy, though the Lords recently have been playing silly buggers around the Employment Rights Act and ignoring the Salisbury Convention (which is that they shouldn’t block manifesto commitments).

I do think the USA goes too far, which has led to frustration among the public and contributed to Trump and the resulting behaviour. I’ve said before that I think the US House of Representatives should have a mechanism to override Senate speed bumps, though not without effort. The idea is to encourage the legislature to compromise but maintain the “primacy” of the House if the Senate is being obstinate. Something like the Parliament Act, is what I’d have in mind.

The Senate in the US is the upper house and can override the House. There is no "primacy" of the House in the US system. The only place where anything like that exists is in impeachment (which is for any member of the executive or judicial branch, not just the president) where the House simply has more votes than the Senate (each member gets 1 vote). Those types of hearings are pretty rare (usually).

Which manifesto commitments have been blocked in this parliament?