Will the US election of 2020 hinge on changes nearly as massive as did the Brit election of 1945?

Clement Attlee. Aneurin Bevan. The Labour victory and the birth of the NHS in 1948.

But at that time the Labour members were deeply committed, and even many Conservatives favored providing top quality and free health care for all.

But today it is questionable whether all or even most Democrats in the new Congress of 2021 would support any version, not of socialized medicine, but even of socialized health insurance.

And would any Republicans that year support it?

Will the "play nice" Democrats retain the filibuster thus enabling even a senate minority of Republicans to prevent it?

They shouldn't, but they likely will.

If the Supremes attack Medicare for All legislation, and perhaps also Obamacare, Social Security, Medicare, and Medicaid, as unconstitutional will the Democrats be too cowardly to simply pack the court?

I take it for granted they will not immediately pack the court to eliminate the threat before it emerges, as well as the obvious and immediate threat to Roe and the sexual revolution in the law that rests on the version of the constitutional right to privacy resting on Griswold.