Twenty-five year old Antonio Alarcon of Queens was in Washington Tuesday after the Supreme Court heard a landmark case that he helped to bring: Whether young, undocumented immigrants like himself, known as "DREAMers," can remain in the United States. A day later, he was back in New York reflecting on the experience.

"I'm still, like, numb,” Alarcon said. “I'm still processing everything that happened yesterday; it was so fast."

Alarcon is one of six New Yorkers who are plaintiffs in a lawsuit challenging President Trump's decision to end a program protecting 700,000 young, undocumented immigrants.

Known as DACA, the Deferred Action for Childhood Arrivals program enables young people brought to the U.S. as children to apply for a temporary status that allows them to work and shields them from deportation.

Signing onto the lawsuit, Alarcron says, was a no-brainer. DACA allowed him to graduate college, the first in his family to do so, and has given him the only life he's known.

He says he had mixed emotions as he attended the Supreme Court hearing and listened to conservative justices ask questions that suggested they may side with the President.

"There was all these moments where you felt a little bit down and there were moments where you felt empowered, but at the end of the day, I think we did our best and now it's [up to] the courts to decide what's best for this country," Alarcon said.

While Alarcon was inside, competing groups of protesters outside supported and denounced DACA.

Ricardo Aca, a "DREAMer" who traveled from Bushwick, Brooklyn, was one of them.

"It was very empowering and it was very inspiring because I was able to see that many people in many different states are fighting for an immigration reform," Aca said. 

Advocates say they're expecting the next several months will be filled with anxiety as they await the Supreme Court's final ruling on the policy, which is expected sometime in the next year.

In the meantime, they say they'll continue their fight.