We already have a one-nation conservative party in the United States: it's called the Democratic Party. Really, only the Bernie wing of the party wouldn't be virtually interchangeable with, say, much of the Torie Party in the UK.
What's so nonsensical about what I said? It was, of course, a little provocative, but I don't think that most Democrats' approach to policy, at least during Obama's administration, has been radically progressive. Take Obamacare, one of the president's crowning achievements: it significantly expanded coverage, but it did nothing to diminish the role of insurance companies in health care. I see it as a moderate and incremental reform that wouldn't have been out of place in a "one-nation conservative" government. In fact, don't forget that Romney signed into law a very similar piece of legislation when he was governor of Massachusetts.
To say that Democrats are Republican-lite would be misleading, but that's only because Pubs have drifted intensely far-right. Dems are mostly centrists on the broader political spectrum, with only the Sanders wing qualifying as "center-left."
