This article by Nate Cohn says:
Among those characterized as Democrats based on party registration or primary vote history, 69 percent identified as Democrats in the poll; similarly, 65 percent of those characterized as Republicans identified as Republicans.
This is a very weak correlation. What is the interpretation of this fact? Conventional wisdom is that the US these days is very partisan and tribal, and that most people who say they're independents actually lean one way or the other -- that, to coin a phrase, most independents are independents in name only (IINOs).
Can it be explained because there are a lot of people who have changed their party preference, but didn't bother to change their voter registration? If so, then they presumably aren't voting in primaries (unless their state has jungle primaries).
Is there evidence that many people register with the party they don't like, so that they can have an influence in that party's primary? (I used to do this.)
Is the conventional wisdom about IINOs just wrong or oversimplified?
Are there just a lot of people who don't pay much attention to politics, so that just as they can't tell you who their congressional representative is, they can't tell you their own voter registration? With motor voter registration, are many people registering to vote quickly and carelessly, not paying much attention to what they put down as their party? (A few years ago, I gathered signatures on a college campus for a city council recall. When I approached students and asked "Are you registered to vote in Fullerton?," the most common response was "I don't know." Many answered yes but then put down an address in a different, nearby city, suggesting that they didn't understand how voter registration worked.)