A group of Democratic Senators, led by U.S. Sen. Ron Wyden of Oregon, has called for President Obama to declassify and release more information about Russia’s involvement in the U.S. election.

Wyden, along with six other senators, signed a letter sent to Obama on Tuesday. All but one are on the Senate Intelligence Committee.

“We believe there is additional information concerning the Russian Government and the U.S. election that should be declassified and released to the public. We are conveying specifics through classified channels,” the letter said.

Wyden Letter

"I have only asked for information to be declassified and released to the American public a handful of times," Wyden wrote on his Facebook page Wednesday night. "The President should declassify and release this specific information regarding the Russian Government and the election."

The letter follows Green Party candidate Dr. Jill Stein’s call for recounts in three states where Donald Trump narrowly beat Hillary Clinton.

A group of computer scientists said it is possible the election was hacked in Wisconsin, Michigan and Pennsylvania but that claim has received criticism, with other experts saying hacking the election would be very difficult.

In October, the Obama administration publicly blamed the Russian government for hacking and attempting to interfere with the election process.