NEW YORK (AP) — The top antitrust official in the Trump administration is leaving her post amid tension about greenlighting big mergers in recent months. Gail Slater, the Justice Department’s assistant attorney general for antitrust, posted on X Thursday that it was with “great sadness” that she was leaving after just a year in the role. The move comes after a back-and-forth decisions about whether to allow Hewlett Packard Enterprises to buy a rival in the telecommunications networking gear