WASHINGTON – New Jersey Senator Cory Booker (D) is joining the Congressional Black Caucus in voicing its concerns about the $14 billion Amazon-Whole Foods merger, reports The Hill.

Booker suggested that he and other members of Congress will send a letter to the Department of Justice highlighting their concerns with the acquisition. “This consolidation that’s happening all over the country is not a positive trend,” he said.

The senator also says that the Amazon-Whole Foods merger brings up issues beyond antitrust concerns. “We’re having a hard enough time getting supermarkets to move into urban communities, to give people choice, to give people price competitiveness, so that actually they’re paying for affordable groceries,” Booker said.

“I worry about grocery consolidation, I worry about the jobs that many of these grocery stores create, and so I am skeptical of this particular merger, highly skeptical of it, and I believe this consolidation as well as other consolidations, we should be holding a far higher bar than we are when we approve these.”

Other members of Congress are also expressing concerns about the merger. U.S. Rep. David N. Cicilline (D-RI), the top Democrat on the House Judiciary Antitrust Subcommittee, called for a hearing on Amazon’s proposed acquisition of Whole Foods, suggesting that the merger could increase costs and decrease wages for Americans as a result of decreased competition in the marketplace.

Robert Riegel, a Whole Foods shareholder, filed a lawsuit in the U.S. District Court for the Western District of Texas to block the company’s sale to Amazon. The suit claims that the deal undervalues Whole Foods and lacks sufficient transparency, and that the proxy statement filed July 7 by Whole Foods is misleading.