The Russians and rogue actors, including ISIS - this is a serious part of the 21st century security challenge that we face.

There are important questions about protecting and securing the border, but we don't need to build a wall.

The main thing we should be focused on is the strategy to destroy ISIS. And I laid out a plan that the Reagan Library before the tragedy of Paris, and before San Bernardino to do just that. It requires leadership, it's not filing an amendment and call it a success.

A lot of conservatives, a big part of the Republican base don't like his position on common core, don't like his position on immigration.

I think Republicans really need to be disciplined, to stay focused on sustained economic growth.

It may be the best that Hillary Clinton can do, but it's not the best America can do.

Developing a strategy, leading the world, funding it to make sure that we have a military that's second to none, and doing the job and making sure that we destroy ISIS there. That's how you keep America safe.