With the Trump administration suddenly sending what appear to be mixed signals on marijuana, a group of senators — mostly Democrats — are urging the new White House not to crack down on legal weed.

In a letter delivered to Attorney General Jeff Sessions on Thursday, Sens. Elizabeth Warren (D-Mass.) and Lisa Murkowski (R-Alaska) asked the Department of Justice to uphold the Obama administration’s policy allowing individual states to determine their own pot laws.

“We respectfully request that you uphold DOJ’s existing policy regarding states that have implemented strong and effective regulations for recreational marijuana use,” the senators wrote in the letter. “It is critical that states continue to implement these laws.”

The letter was cosigned by Sens. Cory Booker, D-N.J.; Patty Murray, D-Wash.; Maria Cantwell, D-Wash.; Ron Wyden, D-Ore.; Jeff Merkley, D-Ore.; Ed Markey, D-Mass.; Brian Schatz, D-Hawaii; Catherine Cortez Masto, D-Nev.; and Michael Bennet, D-Colo. — all Democrats and most from states where marijuana is legal.