I'm always happy to find "new info" when reading stuff that I assume I know, and there were bits and pieces in here that I was not aware of. For instance, in the Articles of Confederation (which preceded the Constitution), under Article XI, Canada is offered a full partnership just by acceding to the terms therein (where all other colonies, etc. would require the approval of 9 states). I wonder if that offer is still "on the table"? Ah, before you scoff ... let me outline the second "I did not know that" moment in this ... do you know when the most recent Constitutional Amendment was ratified? Think about it ... these things tend to be HUGE political dust-ups. The one preceding this lowered the voting age from 21 to 18 at the height of the Viet Nam angst back in 1971. Give up? The 27th Amendment was ratified in 1992. No, I don't recall hearing anything about it either. However, I suspect this has a lot to do with it having been proposed in 1789 but not officially ratified until nearly 203 years later (it has to do with paying Senators and Representatives). If a "housekeeping detail" like the 27th Amendment can be pending for two centuries, why not an open invite to our neighbors to the north to join our Republic!
Another good feature to Bernstein's introduction is a look at the sort of compromises that had to be made in drafting the Constitution ... what groups wanted what things in there, what groups didn't, why certain items (that today sound somewhat odd, like the 3rd Amendment) made it in, and why more sweeping philosophical stances didn't. It's a very enlightening read, and I do hope The Girls will eventually bother to delve into it ("eventually" as they're all between 7 and 11 at the moment, and I figure this is a "remember when" book for some time down the road).
As you can guess, I highly recommend getting a copy of this well before the next election (as I'm guessing that Hillary is not going to want it around!), and this is a very concise and enlightening edition. Oddly enough (or not) Amazon doesn't list this as being in print, however, BN.com as it at its (very low) $4.95 cover price. I'm guessing that it might also be in your local Barnes & Noble retailer.