By moving forward, the trial in a Washington federal court dashes the hopes of Meta boss Mark Zuckerberg that the return of Donald Trump to the White House would see the government let up on the enforcement of antitrust law against Big Tech.

The Meta case is being made by the Federal Trade Commission (FTC), the powerful US consumer protection agency, and could see the owner of Facebook forced to divest Instagram and WhatsApp, which have grown into global powerhouses since their buyout.

The trial will be run and decided by Judge James Boasberg, who is also presiding over a high-profile case involving White House orders to deport Venezuelans using wartime law.

The case against Meta was originally filed in December 2020, during the first Trump administration, and all eyes were on whether he would ask the FTC to stand down.

Zuckerberg, the world's third-richest person, has made repeated visits to the White House as he tries to persuade the US leader to choose settlement instead of fighting the trial, a decision that would be extraordinary at this late stage.

FTC Chair Andrew Ferguson played down such a possibility, telling The Verge, "I'd be very surprised if anything like that ever happened."

As part of his lobbying efforts, Zuckerberg contributed to Trump's inauguration fund and overhauled content moderation policies. He also purchased a $23 million mansion in Washington in what was seen as a bid to spend more time close to the center of political power.

"It would be borderline scandalous if Zuckerberg went to the White House and wound up with a settlement," Jonathan Kanter, an antitrust enforcer under the Biden administration, told CNBC.

The Meta lawsuit represents just one of five major tech antitrust actions recently initiated by the US government.

Google is facing two cases and was found guilty of search-market dominance abuse last August, while Apple and Amazon are also heading to court.

Zuckerberg, his former lieutenant Sheryl Sandberg, and a long line of executives from rival companies will be taking the stand over a trial expected to last at least eight weeks.

Central to the case is Facebook's 2012 billion-dollar purchase of Instagram -- then a small but promising photo-sharing app that now boasts two billion active users.

An email from Zuckerberg cited by the FTC showed him depicting Instagram's emergence as "really scary," adding that is "why we might want to consider paying a lot of money for this."

The FTC argues Meta's $19 billion WhatsApp acquisition in 2014 followed the same pattern, with Zuckerberg fearing the messaging app could either transform into a social network or be purchased by a competitor.

Meta's defense attorneys will argue that its substantial investments transformed these acquisitions into the blockbusters they are today.

They will also highlight that Meta's apps are free for users and face fierce competition.

The FTC argues that Meta's monopoly power is demonstrated by a severely downgraded user experience -- with too many ads and product changes that users have no choice but to tolerate.

- Defining the market -

A key courtroom battleground will be how FTC defines Meta's market.

The US government argues that Facebook and Instagram are dominant players in apps that provide a way to connect with family and friends, a category that does not include TikTok and YouTube.

But Meta disagrees. "The evidence at trial will show what every 17-year-old in the world knows: Instagram, Facebook and WhatsApp compete with Chinese-owned TikTok, YouTube, X, iMessage and many others," a spokesperson said.

"The bigger that Meta can make the relevant market... the more likely it is to defeat the FTC's case," said lawyer Brendan Benedict on Substack.

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