Oh crap, we're blowing our lead in the NL East. This is not good!
By the Way, I'm the new guy around here.
Welcome, from another new guy. As for your post, this is the sort of talk that - seriously, no offense intended whatsoever - I find really unproductive. Let's banish it from our vocabularies!
Face it folks, it's a Bible Truth that we're going to slip in the standings, that the Braves may overtake us, that we may have to retake the lead from them, etc., etc. If we walk around with the expectation that we're going to sit pretty in 1st place the whole way through the season, we're merely asking for the figurative punch in the face once the Nats get swept in some series or another and the Braves step out with the lead. I like to think of the Nats the way I thought about, I dunno, taking my LSAT. (It's one of those Big Deal standardized tests - if you do well you're halfway to getting into a top 20 law school, if you don't you've screwed yourself.) I set VERY low expectations at the outset, and only allow myself cautious optimism - that way if the worst happens I'm braced for it, and if the best happens (as it did/has been in both cases) it's a great upside surprise.
Point is, let's get ready to take our lumps. The Braves ARE a strong ballclub, really scrappy like the Nats, and honestly with a hell of a lot more raw talent especially once they get healthy and their pitching comes back. It will be nothing short of a miracle if we hold them off, but this has been a miracle season so I think it can happen. However, it's good to remember that All Is Not Lost if we don't.