WASHINGTON (AP) — Days after mass shootings in both of his hometowns, President Barack Obama urged his most ardent supporters Saturday “to get back up and go back at it” and help push stalled legislation out of Congress so dangerous people won’t get their hands on guns.

“We can’t rest until all of our children can go to school or walk down the street free from the fear that they will be struck down by a stray bullet,” Obama said in a keynote speech to the Congressional Black Caucus Foundation’s annual awards dinner.