As Republican Senator Cory Gardner holds up Department of Justice nominations in the wake of a federal policy shift on marijuana, other members of Congress from Colorado are taking a stand of their own.

Pot pushback: Gardner holds up DOJ nominees

Four Representatives - Democrats Jared Polis, Diana DeGette and Ed Perlmutter, and Republican Mike Coffman - sent a letter to U.S. Attorney General Jeff Session about his decision to rescind the Cole memo, which essentially allowed pot businesses to operate without prosecution.

What the federal marijuana reversal means for Colorado

The letter says, in part:

"We represent a state that posed the question of marijuana legalization to its voters not once, but twice. Voters first approved the use of medical marijuana and subsequently, our constituents approved its use for adult recreational use. The citizens of Colorado have spoken on this issue. We believe we are obliged to heed their decision. Further, all the laws and regulations put in place governing the use of marijuana in our state clearly restrict it to a matter internal to the state of Colorado."

They all urge Sessions to reinstate the memo.

Notably absent from the letter are Reps. Ken Buck, Scott Tipton and Doug Lamborn, all Republicans.

Read the full letter below.