"Most of the people running for president talk a lot about how tough they are," Ms. Giffords said in a statement Sunday. "But most of them have shown they aren't tough enough to stand up to gun lobbyists."
Hillary Clinton attacks Bernie Sanders on his gun vote →
She said Loughner sought out her services in 2005 and that he frightened her, telling the woman, "I hear voices and they tell me to do things."
Giffords gunman made online rants before killing →