Abortion rights supporters demonstrating at hundreds of marches and rallies Saturday expressed their outrage that the Supreme Court appears prepared to scrap the constitutional right to abortion that has endured for nearly a half-century and their fear about what that could mean for women’s reproductive choices.

Incensed after a leaked draft opinion suggested the court’s conservative majority would overturn the landmark Roe v. Wade ruling, activists spoke of the need to mobilize quickly because Republican-led states are poised to enact tighter restrictions.

In the nation’s capital, thousands gathered in drizzly weather at the Washington Monument to listen to fiery speeches before marching to the Supreme Court, which was surrounded by two layers of security fences.

The mood was one of anger and defiance, three days after the Senate failed to muster enough votes to codify Roe v. Wade.

“I can’t believe that at my age, I’m still having to protest over this,” said Samantha Rivers, a 64-year-old federal government employee who is preparing for a state-by-state battle over abortion rights.

Caitlin Loehr, 34, of Washington, wore a black T-shirt with an image of the late Supreme Court Justice Ruth Bader Ginsburg’s “dissent” collar on it and a necklace that spelled out “vote.”

“I think that women should have the right to choose what to do with their bodies and their lives. And I don’t think banning abortion will stop abortion. It just makes it unsafe and can cost a woman her life,” Loehr said.

A half-dozen anti-abortion demonstrators sent out a countering message, with Jonathan Darnel shouting into a microphone, “Abortion is not health care, folks, because pregnancy is not an illness.”

From Pittsburgh to Los Angeles, and Nashville, Tennessee, to Lubbock, Texas, tens of thousands participated in events, where chants of “Bans off our bodies!” and “My body, my choice!” rang out. The gatherings were largely peaceful, but in some cities there were tense confrontations between people on opposing sides of the issue.

Polls show that most Americans want to preserve access to abortion — at least in the earlier stages of pregnancy — but the Supreme Court appeared to be poised to let the states have the final say. If that happens, roughly half of states, mostly in the South and Midwest, are expected to quickly ban abortion.