We need to send a message to Vladimir Putin through stronger sanctions. We need him to understand that the sanctions that we put in place can have a significant impact on his economy that we need to deter further action from him. And understand who he is, former KGB colonel, he's a bully, and bullies only understand when we punch them in the nose but we need to do that economically. That is our strongest move at this point.

Governor Romney is suffering from political amnesia.

There is scientific evidence that demonstrates there is some impact from human activities. However I don't think the evidence is conclusive.

As a former attorney general. I have the greatest respect for the criminal justice system. But it is not good at intelligence gathering.

I was the first Republican in the country to support the president's Clean Power Plan.

If we were to impose greater sanctions on economic sectors, I think we could have a significant impact on Putin.

We need to send a message to Vladimir Putin through stronger sanctions. We need him to understand that the sanctions that we put in place can have a significant impact on his economy that we need to deter further action from him. And understand who he is, former KGB colonel, he's a bully, and bullies only understand when we punch them in the nose but we need to do that economically. That is our strongest move at this point.