There is no address given for McCabe, so it's hard to tell the significance – although worth investigating. And if McCabe hid the information, that would definitely matter.
I lived a mile from the Clintons as well, and it meant exactly nothing.
“I lived a mile from the Clintons...”
That means you were neighbors with not just the Clintons but also McCabe.
That’s a heck of a coincidence.
If you've been in the Enchanted Forest where Wicked Witch of the Left walks, talks and takes selfies with strangers, it could mean all sorts of things...
If you're a nobody living next door to the Clintons, you would have zero interactions with them. If you are somebody who might potentially be useful to them, and you lived within the same town, you can be sure to get weekend barbecue invitations.