"I have made a decision to run and will be making a formal announcement within the next week", Gabbard, a liberal 37-year-old Iraq War veteran as well as the first Hindu and first Samoan-American elected to the US Congress, told CNN.
CNN reported Ms Gabbard saying there are a lot of challenges facing the people of the United States and she wants to help solve them.
Tulsi Gabbard says she has chose to run for president and will hold a formal announcement within the next week.
Obama, now the elder statesman of the Democratic party has not endorsed Gabbard or Harris or any one of the 15 or more Democrats considering a presidential run, to go up against President Donald Trump in 2020.
According to CNN, Senator Sanders's 2016 deputy campaign manager Rania Batrice will be Ms Gabbard's campaign manager.
"There are a lot of reasons for me to make this decision", Gabbard said.
Gabbard says she will run on a platform that includes criminal justice issues and climate change, but she tells CNN that America's ongoing wars will be her central focus.
Gabbard is now serving her fourth term in congress after being elected in 2012 to the US House, serving Hawaiʻi's 2nd District.
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The 37-year-old Iraq War veteran is the first Hindu elected to Congress and the first member born in the US territory of American Samoa.
The Iraq war veteran has become the first-ever Hindu to be running for the presidency in the US. She quit the DNC in early 2016 to endorse Sen.
Asked previous year whether she would still consider running if Senator Sanders ran, Ms Gabbard said Senator Sanders is a friend and she did not know what his plans were. Gabbard supported legislation that made it more hard for Syrian refugees to enter the U.S.
Gabbard recalls that she found the meeting encouraging.
She drew controversy when she met with Syrian president Bashar al-Assad in 2017 amidst the brutal civil war there. She quickly established herself as a voice for her party's left on domestic issues and a critic of foreign military intervention.
"Tulsi Gabbard has an even bigger problem than her lack of experience - it's that she has no base of support", Republican National Committee spokesman Michael Ahrens said. Former Vice President Joe Biden and former Rep. Robert Francis "Beto" O'Rourke (D-TX) are also reportedly considering running for president.