Good-faith re-examination of a position you've held in the past should be seen as a virtue, not a vice.

Political differences will always generate a healthy debate, but over time the dialogue has become more hateful and at times violent.

We really don't have a policy [on climate change]. There's a lot of rhetoric and not a lot of action.

Good-faith re-examination of a position you've held in the past should be seen as a virtue, not a vice.

The choreographed standing and clapping of one side of the room - while the other side sits - is unbecoming of a serious institution and the message that it sends is that even on a night when the president is addressing the entire nation, we in Congress cannot sit as one, but must be divided as two.

There is no question that we must do more to secure our borders - but how we go about securing them is also important.

You don't climb mountains without a team, you don't climb mountains without being fit, you don't climb mountains without being prepared and you don't climb mountains without balancing the risks and rewards. And you never climb a mountain on accident - it has to be intentional.