Trust me: our critical infrastructure is vulnerable to cyber-attack, to potential terrorist attack, and we are not taking this threat seriously enough.

There is a real problem in terms of the refugee flow, the ability of ISIS to infiltrate those refugee flows, our inability to track them.

Fixing this broken system will take the perspective of someone who has actually solved problems. 31 years of manufacturing taught me how.

We actually do need a federal government, but we need a limited one.

It's more complex than just slapping up a wall. We have got to take a look at all the complexities in terms of eliminating the incentives for illegal immigration.

There are a lot of young kids serving in Washington, D.C.: kids that are smart, hard-working, but they've never farmed. They've never run a business. They've never been in the private sector. They went from high school into college and right into Washington, D.C.

To me, support versus endorse are two totally different things.

One of the promises I made when I ran was, I'll never vote with my reelection in mind.

Never denied climate change. It has always changed and always will.

I created jobs. Russ Feingold, during that same approximate 30 years, what did he do? He built government. He built it larger and more intrusive.

I'm not a political pundit.

When I joined the Senate in January 2011, I raised my right hand, placed my left hand on the Bible, and swore a solemn oath to support and defend the Constitution of the United States. Defending the constitutional domain of the branch of government in which I serve is an obligation of that oath.

When I feel there's a door open, you always walk through it.

What we should be doing is responsibly addressing the primary drivers of our debt and deficit issues.

I realize the voters elected President Obama in 2012, but they also, in 2014, elected enough Republican senators to gain a majority in the Senate, so we control the confirmation process. And these are two supposedly coequal branches of government involved in this filling of a Supreme Court vacancy.

In Wisconsin, we have got a lot of agricultural products that are exported. We have a lot of manufacturing products that are exported. I don't want to engage in a trade war.

The whole climate change debate gives - and there are all kinds of quotes from adherents of and promoters of climate change - the reason they're doing it is it's such a great opportunity to control, you know, pretty much, government, and control your lives.

I'd be 100 percent supportive of a minimum wage - kind of industry specific, maybe regionally specific - for guest workers, so that we're not creating incentives for employers to bring in immigrants to lower the price of labor.

Successful ideas, they snowball.

I don't respect phoniness.