I had a serious childhood illness - sort of like spinal meningitis - that led to a three-month hospitalization. Afterward, I couldn't be insured because of a pre-existing condition.

Our constitutional liberties shall not be sacrificed in our search for greater security, for that is what our enemies and all enemies of freedom and democracy hope to achieve.

In my grandfather's lab, scientists did independent research, and peers reviewed and commented on its merits. Politics, he taught me, had no place in the scientific process.

I have no idea what goes on in another person's mind. As a legislator, I need to be good at persuading people, counting votes and getting to 50 percent plus one. I don't go back and say, 'Why did this person get to the right position?' It's only, 'Are you yes or are you no?

It is hard to look the other way when a dictator is being so cruel and violent with his own people.

I’ve decided to run for the U.S. Senate because I believe Wisconsin families need a senator who will work hard to deliver results for the middle class - a leader with the courage to do what’s right, no matter how tough the odds or how powerful the special interests we have to fight.

All my life, the naysayers have told me that I can't win because I'm a progressive... because I'm a woman... even because I'm a lesbian.