WASHINGTON (Reuters) – A bipartisan group of U.S. state attorneys general sent a letter to lawmakers on Monday urging them to pass a series of bills that tighten antitrust laws aimed at Big Tech companies like Facebook (NASDAQ:) and Alphabet (NASDAQ:)’s Google.

A letter addressed to both leaders of the Senate & House of Representatives expressed clear support for the six House Judiciary Committee bills in June. The platform powers of Big Tech are addressed in four bills, while the enforcer powers are dealt with by two.

A measure that if passed would guarantee that state attorneys general bring antitrust cases to the court they pick, something plaintiffs usually prefer.

Although some measures have not been accompanied by Senate bills, the full House has yet to vote on them.

We encourage Congress to keep improving these vital measures. The attorneys general added that these provisions include measures to increase consumer protections against illegal and reckless mergers and other business practices. They also provide necessary improvements to ensure competition and innovation do not get stifled.

Phil Weiser, the Colorado Attorney General and Letitia James (New York), Rob Bonta (California) and William Tong (Connecticut) signed the letter.

The Republican signatories were Jeff Landry from Louisiana, Douglas Peterson in Nebraska and Sean Reyes in Utah.

Three antitrust suits against Google have been filed by state attorneys general. One against Facebook is pending. The lawsuits they filed allege price fixing in the generic drug sector.