The Justice Department drove a stake through the heart of Comcast’s bid for Fox

It might be time for Comcast to throw in the towel.

By appealing the AT&T-Time Warner decision, the Justice Department complicated the company’s chance to buy most of 21st Century Fox (FOXA).

Comcast (CMCSA) has been in a bidding war with Disney (DIS) over Fox, which is selling its movie studio, international assets and cable channels like FX and National Geographic. Disney regained the upper hand when it increased its offer a few weeks ago to $71.3 billion, and analysts have been speculating about whether Comcast would try to top that bid.