This country of ours, this system of ours, the rule of law, the opportunity to get an education and go as far as your hard work and ambition will take you, and we created the biggest engine of economic growth in the world, the American middle class.

Senator Obama's support among hardworking Americans - white Americans - is weakening.

I'm going to keep speaking out about what Donald Trump says, because I'm getting messages from leaders around the world who are just bewildered. They want to know what's going on.

Donald [Trump] never tells you what he would do. Would he have started a war? Would he have bombed Iran? If he's going to criticize a deal that has been very successful in giving us access to Iranian facilities that we never had before, then he should tell us what his alternative would be.

Every time I meet somebody who's been affected by something I worked on, I feel like, yes, that's what I want to do, whether the Children's Health Insurance Program or making drugs safer for kids or helping more kids get a doctor, whatever it might be.

I would also do everything possible to take out their leadership.

We know that russians are deeply engaged in supporting Assad because they want to have a place in the Middle East. They have a naval base, they have an air base in Syria.