President Obama on Friday responded to petitioners calling for tighter gun control, urging them to "keep at it."
"I can't do it alone. I need your help," Obama said in a video message released by the White House. "I'm asking for your help to make a real, meaningful difference in the lives of our communities and our country, and make sure the United States of America is a safer, stronger place for our children to learn and to grow."
Watch the video: