In a letter to Google CEO Sundar Pichai and YouTube CEO Neal Mohan, five Senators — Elizabeth Warren (D-MA), Ron Wyden (D-OR), Bernie Sanders (I-VT), Richard Blumenthal (D-CT), and Jeff Merkley (D-OR) — asked for details about any settlement talks between those companies and the Trump administration. They’re interested in whether Google secured favorable treatment as a result of the payout, including leniency in multiple ongoing antitrust lawsuits, something they warn could constitute an illegal bribe.

The deal between Trump and YouTube settles a lawsuit Trump filed in 2021 after he was suspended from the platform. It’s raised eyebrows thanks to the weak legal rationale (courts have all but unanimously declared social media companies can ban users) and the fact that YouTube’s parent company would benefit greatly from winning Trump’s favor.

Google recently appeared in court to determine how a judge should neutralize its monopoly in the ad tech sector — with the Department of Justice arguing for a dramatic breakup. The government could still choose to settle that case with far less drastic remedies. Google is also entangled in a search antitrust suit, where a judge proposed milder remedies than the preceding Biden administration asked for, and the Trump administration will be in charge of deciding how hard to push an appeal.

“The public deserves to know whether YouTube’s settlement will influence the Trump Justice Department’s decision regarding whether to appeal and seek the stricter remedies DOJ had originally sought against Google,” the letter says. If YouTube settled a “legally dubious lawsuit” to avoid those remedies, “the company and its executives may have run afoul of the law,” it says, citing the federal anti-bribery statute as well as California’s Unfair Competition Law.

The vast majority — $22 million — of YouTube’s payment was earmarked to support the construction of a new White House ballroom. Trump is reportedly scheduled to hold a fundraising dinner for the ballroom later today, according to CBS News.

Several of the senators previously wrote to Google and YouTube in August, before the settlement was announced, warning them against paying for favorable treatment. As noted in this latest letter, the companies responded saying they’d had “no discussion tying any potential settlement of the case to any official action or to any pending or potential future matters involving Alphabet or any of its affiliates, and there will be no such discussions.” The lawmakers are pushing to determine whether this was the truth.

YouTube isn’t the only company that has settled a spurious Trump lawsuit. The president extracted $16 million from Paramount as it sought merger approval from the government, and Xand Meta respectively paid “about $10 million” and $25 million to settle suits similar to the YouTube ones. Earlier this year, Warren said that the Meta settlement “looks like a bribe.”