Albertsons on Wednesday formally terminated its proposed $25 billion merger with Kroger and filed a lawsuit against its supermarket competitor, saying Kroger violated its contract and did not follow through on commitments to help get the deal approved.

It comes a day after a judge blocked the planned tie-up.

In a news release, Albertsons said Kroger broke its merger agreement “by repeatedly refusing to divest assets necessary for antitrust approval, ignoring regulators’ feedback, rejecting stronger divestiture buyers and failing to cooperate with Albertsons.”

“Kroger’s self-serving conduct, taken at the expense of Albertsons and the agreed transaction, has harmed Albertsons’ shareholders, associates and consumers,” Albertsons’ General Counsel and Chief Policy Officer Tom Moriarty said in a statement. “We are disappointed that the opportunity to realize the significant benefits of the merger has been lost on account of Kroger’s willfully deficient approach to securing regulatory clearance.”

In a statement, Kroger called the allegations in the lawsuit “baseless and without merit.”

“This is clearly an attempt to deflect responsibility following Kroger’s written notification of Albertsons’ multiple breaches of the agreement, and to seek payment of the merger’s break fee, to which they are not entitled,” the company’s statement said.

About two years ago, Kroger announced plans to buy Albertsons and combine forces to fend off Walmart, Amazon and Costco. The deal would have put nearly 40 supermarket chains, including Kroger’s Fred Meyer and Albertsons’ Safeway, under a single company.

The lawsuit Wednesday amounts to something of a corporate divorce battle.

The companies are at odds about who should pay for the legal fees associated with the merger and who, if anyone, is responsible for paying a breakup fee.

Albertsons said in its news release that it is owed both a $600 million termination fee and “relief reflecting the multiple years and hundreds of millions of dollars it devoted to obtaining approval for the merger, along with the extended period of unnecessary limbo Albertsons endured as a result of Kroger’s actions.”

Kroger, on the other hand, pushed back against payments to Albertsons in its statement and said it “looks forward to responding to these baseless claims in court.”

Shares of Albertsons and Kroger were up about 0.5% and 1%, respectively, in early trading Wednesday.

Wall Street dealmakers and corporate leaders expect the flood gates to open on merger and acquisition activity after President-elect Donald Trump takes office in January.

And he’ll likely have congressional help. Trump defeated Democratic candidate Vice President Kamala Harris, and Republicans claimed a majority of the Senate in elections this week. That red wave is expected to spell loosening regulations on deal-making, with plenty of pent-up demand.

“We know kind of where the world is headed in a Trump environment because we’ve seen it before,” said Jeffrey Solomon, president of TD Cowen, on CNBC’s “Money Movers” Wednesday. “I think the regulatory environment will be much more conducive to economic growth. There will be lighter and targeted regulation.”

Solomon added that the scaled-back regulation will be focused on certain areas “of particular interest to the Trump administration,” rather than a broad based reassessment of the entire landscape.

In recent years, there has been greater scrutiny of pending deals by the Biden administration’s Department of Justice and Federal Trade Commission, headed by Chair Lina Khan. Some have pointed to that dynamic as a chilling factor on deal flow. High interest rates and soaring company valuations have contributed, too.

Khan said in September that “when you see greater scrutiny of mergers, you can see greater deterrence of illegal mergers.” Her hard line has drawn harsh criticism, but now, there’s optimism around a forthcoming FTC with a lighter hand.

“Assuming interest rates drop and you see corporate tax rates go down, the ingredients are there for a really active M&A market,” said one top dealmaker, who talked to CNBC on the condition of anonymity to speak candidly.

On Wednesday, markets rallied on the Republican presidential win, with the Dow Jones Industrial Average soaring 1,500 points to a new record high.