Moreover, there's no better evidence that connecting with the American people on a human level is the best campaign strategy than "the show of emotion heard 'round the world" -- when, in a New Hampshire coffee shop, Hillary Clinton choked up, eyes welled with tears, and almost cried, but did not. For her, she said, the campaign for the presidency was not just political, not just public, but personal. In essence, she was saying, "If I fail here, I know I will have let the nation down, when I know I have been given so much and I could have helped and moved it forward. I need your help." And there, for perhaps the first time in her public life, the American people saw that Hillary Clinton was a real person, with vulnerabilities and hurts just like them. Some strategists thought it would reflect negatively on her. It did not. In fact, it boosted her standing with the American people.

In some sense, Hillary Clinton is a product of the dour, Protestant Washington, D.C. world around her. The daughter of a reserved Methodist, suburban-Chicago, Republican family, she further fine-tuned that inner emotional control after learning and obeying the Washington rule that a woman can't show emotion as a public official, or she will appear "overly emotional" or, even worse, "not tough enough." Disregarding for the moment the fact that the cultural norm's premise perpetuates some of the worst stereotypes about women, the cultural norm's effect on Hillary Clinton led to her showing no emotions in public on some occasions, and too little emotion during the rest. In short, she overcompensated, and the results showed in her New Hampshire campaign prior to Sunday. Moreover, if anything, given her reserved upbringing, she should have compensated the other way.

Enter James Carville

Can Hillary Clinton revitalize her campaign and win the nomination? Yes she can -- and in some sense that revitalization began late Sunday and early Monday at the New Hampshire coffee shop -- but it is going to be the toughest battle she has faced in her life. "The toughest battle we've ever faced," you can hear Bill Clinton sharing it with her now, "but I'll tell you Hillary ri-ight now, we'll show the people what you and I can do for this nation and we're gonna win."

Look for James Carville, the ace strategist of Bill Clinton's presidential election victories in 1992 and 1996, to join the campaign as a chief adviser or strategist. Then look for Carville to develop a basic, positive, human-appeal theme that shows people why Hillary Clinton is much more qualified to be -- and is the appropriate choice for -- the party's nominee for president.

Underscoring, among Democrats currently running, that Hillary Clinton is the most qualified person to become president of the United States. That point is a matter of undeniable fact. By extension, she's also the candidate most likely to defeat the Republican Party's nominee. Now it's up to Hillary, and Bill, and Carville, to show the American people that Hillary Clinton also likes them, identifies with them, and is a great person to be around, and that she will dedicate her life to solving our nation's problems and making the United States a better place. If Hillary Clinton does that, she'll be the Democratic Party's nominee for president of the United States.

Financial Editor Joseph Lazzaro is also writing a book on the U.S. Presidency and the U.S. economy.