The U.S. Supreme Court last week denied a new trial for Abu-Jamal, a former Black Panther convicted of murdering Philadelphia Police Officer Daniel Faulkner, The Philadelphia Inquirer reported Sunday.
His supporters are circulating petitions urging U.S. Attorney General Eric Holder Jr. to intervene. Supporters said they will also ask U.S. Rep. Chaka Fattah, D-Pa., to take their plea to President Barack Obama.
"This is a new administration, and we are looking for honesty and fairness," said MOVE member Pam Africa, one of the organizers.
The Supreme Court is still considering a petition by prosecutors to reinstate Abu-Jamal's death sentence, the newspaper reported.
Abu-Jamal supporters previously appealed to the Clinton administration but were rejected. Africa said she hoped the Obama administration would react differently.
"It's clear Mumia did not have a fair trial," she said. "Evidence was most definitely withheld. This is a test for this new administration right here."