After deflecting the U.S. Justice Department’s attack on its illegal monopoly in online search, Google is facing another attempt to dismantle its internet empire in a trial focused on its abusive tactics in digital advertising. The judge found that Google has been engaging in behavior that stifles competition to the detriment of online publishers that depend on the system for revenue. No matter how the judge rules, Google says it will appeal the earlier decision labeling the ad network as a monopoly. The case, filed in 2023 under President Joe Biden’s administration, threatens the complex network that Google has spent the past 17 years building to power its dominant digital advertising business. The Justice Department contends a breakup would be the most effective and quickest way to undercut a monopoly that has been stifling competition and innovation for years.