Antitrust agencies have finalized an overhaul of rules the government uses to determine whether deals violate competition law to extend a crackdown on illegal mergers and acquisitions.

Kroger Co. and Albertsons Cos. are bracing for a Federal Trade Commission lawsuit over their $24.6 billion tie-up as soon as January as opposition builds against the supermarket megadeal.

The Federal Trade Commission is expected to sue Amazon for antitrust violations next week, according to people familiar with the matter — the agency’s fourth swipe at the retail giant in 2023.

The Senate plans to hold a hearing in November on Kroger Co.’s planned $24.6 billion takeover of Albertsons Cos.