Protesters in New York City, Philadelphia and Washington, on Friday chanted slogans against Trump’s controversial order and showed their support for the Syrian people.
Activists in New York had signs denouncing the bombing, including placards that read "Bombing Syria doesn't protect people, it KILLS THEM" and "NO! In the name of humanity, we refused to accept a fascist America."
The demonstrators also expressed their resentment against Washington’s warmongering policy and said bombing Syria would create even more conflict, not resolution.
"It's only going to escalate the violence," Martin Jennings, a protester, told local media. "I'm really concerned about the future of the Syrian people."
Some protesters said they did not believe Syrian President Bashar al-Assad was behind Tuesday's suspected chemical attack and said intervention would only make things worse.
"Get out of Syria, stop interfering, and let the people of Syria decide for themselves," protester Greg Butterfield said.
Anti-war demonstrations have been planned for 50 cities across the US for the weekend.