You hear it every four years, ... Scare the seniors, scare the seniors.

Tolerance of dissent is the hallmark of a mature party, and it is well past time for the Republican Party to grow up.

The abuse of prisoners hurts America's cause in the war on terror, endangers US service members who might be captured by the enemy, and is anathema to the values Americans have held dear for generations.

Americans have got to understand that we are paying present-day retirees with the taxes paid by young workers in America today. And that's a disgrace. It's an absolute disgrace and it's got to be fixed.

I think where [Donald Trump] loses most hawkish republicans is when he talking about how much he likes [Vladimir] Putin. That should make any person who believe in the American exceptionalism, incredibly uncomfortable.

In the 21st century nations don't invade other nations.

Europeans are greater than they have been since any time since the end of the Cold War.