John did this every day. Whether it was to demand the best possible leadership and support for our armed forces, or to empower freedom fighters against dictators around the world, or to demand that perpetrators of torture and human rights abuses be punished, or to make sure our native American communities are treated with dignity and respect. John McCain fought for others every day of his life, whether he was wearing a uniform or standing on the floor of the U.S. Senate.

With his passing, America inherently understood that this is the kind of leadership we want. That this is the kind of country we want to be. And that it is now up to us — all of us — to get into the arena and fight. Each of us must do something to fight for a greater cause. We can lead, we can support, we can contribute, we can donate — but we must do something.

John’s memory inspires me to be in the arena every day. Thank you for all the kind messages about my husband. I am grateful. Since his passing, thousands of people have asked how they can do something to honor Sen. McCain. I’ll tell you how: Join me in the arena. Fight for a greater cause.