"I've pretty much always used my positions as a bully pulpit. What that means is strongly advocating for the things I feel are really important. Gun violence, to me, is the highest-priority public-health issue, and I have to make sure Congress is aware of it, the American people are aware of it, the president is aware of it, and that we all begin together to develop policies to exterminate the disease - the epidemic, really - of gun violence."