Obama's intervention will see transgender Manning, born Bradley, released from prison in May 2017, shaving 27 years off her original 35-year sentence for leaking 700,000 sensitive military and diplomatic classified documents to WikiLeaks in 2010.
Manning's reprieve has also led to calls for another whistleblower, Edward Snowden, to be pardoned for disclosing classified information about the US government's bulk surveillance programs.
VICTORY: Obama commutes Chelsea Manning sentence from 35 years to 7. Release date now May 17. Background: https://t.co/HndsbVbRer
— WikiLeaks (@wikileaks) January 17, 2017
Former National Security Agency (NSA) employee Snowden, who has been living in exile in Russia since 2013, is facing charges of violating the US Espionage Act and theft of government property, which could see him spend decades in prison.
"We also hope President Obama will take the logical next step by pardoning NSA whistleblower Edward Snowden, whose release of information the president himself recognized has led to an important public debate," said Sarah St. Vincent, national security and surveillance researcher of campaign group Human Rights Watch (HRW).
So Chelsea Manning 35-year sentence to be commuted. Awesome.
— Mehdi Hasan (@mehdirhasan) January 17, 2017
Next, a pardon for @Snowden too? @POTUS? Yeah?
Amnesty International echoed the sentiment, calling on Obama to "use his executive powers during his remaining days to pardon whistleblower Edward Snowden."
Like Manning's leaks, Snowden's revelations were instrumental in exposing illegal US government practices, with supporters of the former NSA employee arguing that his leaks to journalists, and their subsequent publication, justify being pardoned.
Is @realDonaldTrump gonna let Obama show him up by commuting Chelsea Manning's sentence? SAD! One up him & pardon @Snowden & Julian Assange!
— Secular Talk (@KyleKulinski) January 17, 2017
"The resulting stories spurred significant reforms and two independent review panels in the US, as well as important developments at the United Nations and globally, where the right to privacy was recognized as endangered in this digital age," said HRW general counsel Dinah PoKempner.
Will Assange Hand Himself in?
The debate over the fate of whistleblowers has also led to questions about the future of WikiLeaks founder and editor-in-chief Julian Assange.
Last week WikiLeaks tweeted:
If Obama grants Manning clemency Assange will agree to US extradition despite clear unconstitutionality of DoJ case https://t.co/MZU30SlfGK
— WikiLeaks (@wikileaks) January 12, 2017
Following the decision to commute a large slice of Manning's sentence, Assange released a statement describing her as "a hero, whose bravery should have been applauded not condemned."
He also called for the US government to "immediately end its war on whistleblowers and publishers, such as WikiLeaks and myself", however he made no mention of his Twitter pledge to hand himself in and whether he intends to honor it.
So will Assange keep his word and hand himself in now Manning has been pardoned? Probably not #WikiLeaks
— Paul Watson Joseph (@unprisonplanet) January 17, 2017
WikiLeaks' Twitter statement has led to speculation that Assange, who has been living in London's Ecuadorian embassy since 2012, might be close to ending his four-and-a-half-year exile in the building.
Melinda Taylor, a member of Assange's legal team, indicated that the WikiLeaks would follow up on his pledge.
"Everything that he has said he's standing by", she said.
Melinda Taylor (Assange's lawyer) seems hopeful that Trump will be a more favourable Pres on whistleblowers & press. Good grief. #TheWorld
— Wes Mountain (@therevmountain) January 18, 2017
The US justice department has never announced any indictment of Assange and it is unclear whether any charges against him have been brought under seal. However, the department has acknowledged that the FBI is investigating WikiLeaks' publication of classified documents.
The Australian is also the subject of a European arrest warrant over sexual assault claims allegedly committed in Sweden.