From what I've read about people who had similar grades, it is definitely NOT a deal-breaker. Can you pinpoint the reason why you got the D? Just struggle to get acquainted to college atmosphere, maybe other extensuating circumstances? Can you learn from your mistakes this year and use that (along with working your tail off) to do better from here on out... maybe even turn "that single early D" on your transcript into a decent growing point for adcoms.
And GPA-wise, being a freshman your GPA number hasn't soldified yet.If you pulled mostly A's and some B's from here on out I think you'd still be fine.