In the wake of their embarrassing electoral defeat in November, Congressional Democrats are turning against the wealthy tech benefactors who bankroll their campaigns. To wit, a group of 12 Democratic Congressman have signed a letter urging the Department of Justice and the Federal Trade Commission to conduct a more in-depth review of e-commerce giant Amazon.com Inc.’s plan to buy grocer Whole Foods Market Inc., according to Reuters.

Rumblings that Amazon is engaging in monopolistic business practices resurfaced last week when the top Democrat on the House antitrust subcommittee, David Civilline, voiced concerns about Amazon’s $13.7 billion plan to buy Whole Foods Market and urged the House Judiciary Committee to hold a hearing to examine the deal’s potential impact on consumers.

Making matters worse for the retailer,  voiced concerns that the FTC is investigating the company for allegedly misleading customers about its pricing discounts, citing a source close to the probe.

The letter is at least the third troubling sign that lawmakers are turning against Amazon, even as President Donald Trump has promised to roll back regulations, presumably making it easier for megamergers like the AMZN-WFM tieup to proceed.

So far, it’s mostly Democrats who are urging the FTC to take “a closer look” at the deal. However, some suspect that Amazon founder Jeff Bezos’ ownership of the Washington Post – a media outlet that has published dozens of embarrassing stories insinuating that Trump and his compatriots colluded with Russia to help defeat Democrat Hillary Clinton – could hurt the company’s chances of successfully completing the merger, as its owner has earned the enmity of president Trump. Similar concerns have dogged CNN-owner Time Warner’s pending merger with telecoms giant AT&T.

In the letter, the group of Democratic lawmakers – which includes rumored presidential hopeful Cory Booker, the junior senator from New Jersey – worried that the merger could negatively impact low-income communities. By putting other grocers out of business, the Amazon-backed WFM could worsen the problem of “food deserts,” areas where residents may have limited access to fresh groceries.