"The rise of authoritarianism is encroaching in every aspect of life, whether it's government or corporate or technological," Manning warned in an interview with The Associated Press.
Manning's platform includes promises to restructure the criminal justice system, close prisons and free inmates, provide universal health care and a basic income, and eliminate national borders, including the abolition of the US Immigration and Customs Enforcement agency.
The candidate says her life experience, from her time as a homeless person on the streets of Chicago to her experience in the military and her time in prison make her an effective candidate with a "bigger vision" than career politicians.
Manning was charged with 22 offenses, including violating the Espionage Act and stealing government property, and sentenced to 35 years in prison for her 2010 leak of hundreds of thousands of government documents, including videos of suspected war crimes in Iraq and Afghanistan. Coming out as transgender in 2013 after her court martial, Manning had her sentence commuted by President Obama at the end of his term. A UN official has described her treatment in prison as "cruel, inhuman and degrading." Manning made two suicide attempts in 2016.