Commenters scrambled to call Gabbard, who had spoken out against condemning Assad for his alleged war crimes, on her reconciliatory attitude toward him.
She drew controversy when she met with Syrian president Bashar al-Assad in 2017 amidst the brutal civil war there.
She said she met with him to show that US can "truly care about the Syrian people" with the hope of achieving peace.
"There are many reasons I'm offering to serve you as President - to ensure every American gets the healthcare they need, to bring about comprehensive immigration reform, to make sure we have clean water and clean air for generations to come, to fix our broken criminal justice system, to end the corrupt influence of special interests in Washington, and so much more".
She is the first Hindu member of Congress and its first Samoan American member, and she sits on the House Foreign Affairs Committee.
Kamala Harris, 54, who is of Indian and African-Jamaican descent and is identified as a member of the Christian Baptist sect, is expected to announce her candidature for the Democratic Party nomination next week, according to several news reports quoting sources close to her.
NYC Mayor Announces Health Care Coverage For All New York City Residents
MAYOR BILL De Blasio (second from right) announces a plan to offer low-cost or free health insurance to low-income New Yorkers. Indeed, NYC Care would be a mix of insurance and direct spending. "We don't want people to go out of business".
Harrington to captain Europe at 2020 Ryder Cup
Harrington is known to have been a popular choice among the team that stormed to victory in Paris previous year . Fred Couples is a contender, while I doubt if Tiger Woods or Phil Mickelson will be right for the job next year.
Russian tied to Trump Tower meet indicted in separate US case
The indictment unsealed Tuesday will curtail Veselnitskaya's worldwide travel and expose her to arrest if she comes to the U.S. The indictment of Veselnitskaya was handed down by federal prosecutors for the Southern District of NY .
She was condemned by Democrats and Republicans alike, as the prevailing narrative in the USA is that the Syrian president is a war criminal because he purportedly used chemical weapons against civilians.
Since entering national politics in 2012-when she became the first Hindu elected to Congress-she has been an outspoken critic of the bipartisan consensus on foreign policy.
Gabbard, 37, is widely known for her unorthodox positions within the Democratic caucus.
Another issue that has done a disservice to Tulsi Gabbard among left-wing voters is her prior stance on gay marriages. She also noted that the 2003 invasion of Iraq was based on faulty intelligence and said that she wanted to understand the evidence of the Syria attack.
A number of other potential Democratic candidates, including heavyweights like former Vice President Joe Biden and Vermont Sen.
Ms Gabbard was born in American Samoa in 1981.
Gabbard was one of the most prominent lawmakers to back Sanders over Hillary Clinton in the 2016 Democratic presidential primary.