Nate Silver: “An underappreciated problem is that Trump’s candidacy is relatively lacking in precedent, which means we’re all trying to figure this out as we go along. Traditional journalists have had trouble covering Trump, but so have empirically-minded ones like us here at FiveThirtyEight. We laid long odds against Trump getting this far, in large part because no similar presidential candidate has done so since primary and caucus voting became widespread in 1972.”

“Put another way, Trump has hacked the system and exposed the weaknesses in American political institutions. He’s uncovered profound flaws in the Republican Party. He’s demonstrated that third-rail issues like racism and nationalism can still be a potent political force. He’s exploited the media’s goodwill and taken advantage of the lack of trust the American public has in journalism. Trump may go away — he’s not yet assured of winning the GOP nomination, and he’ll be an underdog in November if he does — but the problems he’s exposed were years in the making, and they’ll take years to sort out.”

Rick Klein: “Donald Trump said Tuesday night that a reporter’s pen might have been a ‘little bomb.’ That has nothing on what came out of Trump’s mouth in the CNN forum, where he renounced the famous pledge to support the GOP nominee, and proceeded to make conservative jaw drops with his answers to policy questions. Trump named education and healthcare as two of the top three functions of the federal government, and seemed to endorse the idea of Japan, South Korea, and Saudi Arabia getting nuclear weapons. That doesn’t even get into the Corey Lewandowski incident, where Trump is now threatening legal action against reporter Michelle Fields, despite the criminal charges filed against his campaign manager.”

“It’s now more clear than ever that if Trump wins the Republican nomination, he won’t do it as a conservative in any traditional sense of the word, or as a candidate who fits any norm in American politics. Maybe that’s the secret to his success. But if Trump wins Wisconsin next week despite all of this – or even because of it – will a plausible path to blocking Trump continue to exist? This could be the showdown all sides have been waiting for.”

Donald Trump boasted to People magazine that he only needs 4 hours of sleep a night.

When asked if he worked out regularly, he said: “Don’t have to. When you’re making speeches for 25,000 people and shouting and screaming and having fun with everybody and making America great again, you get a lot of exercise.”

Jonah Goldberg: “If Trump misses the mark by, say, 150 delegates, that would be significantly more than the delegate totals of Iowa, New Hampshire, and South Carolina combined. It’s one thing to deny the trophy to the guy who finished a few yards shy of the finish line. It’s another if he misses it by a mile. The bigger the shortfall, the easier it is to persuade delegates that they are not defying the popular will by denying Trump, particularly given the widespread conviction that Trump would be crushed in a general election (with the GOP being torn apart in the process).”

“Cruz would be the most likely victor in a floor fight, but that isn’t assured. The longer the balloting goes, the more likely it is that the bitter and bleary-eyed delegates will opt to order off-menu. That’s what Kasich is allegedly counting on. But Kasich is widely disliked, and it might be a good deal easier to find a unifying candidacy in, say, Rick Perry, Scott Walker, Nikki Haley, or Mike Pence.”

“I know what I’m doing. I’m a smart person. The highest level of smart.”

— Donald Trump, in an interview with People magazine.