Hillary Clinton got misty-eyed again.

A close-up shot of Clinton at a meeting reveal what appear to be moist eyelids on the former first lady before she took the microphone Monday at a Yale Child Study Center event in New Haven, Conn.

The moment came after one of her old law school professors Clinton indicated the moment had gotten to her.

"I said I would not tear up. Already, we're not exactly on that path," Clinton told the audience

The comment comes just one day before the presidential candidates face voters in Super Tuesday polls, and Clinton is hoping to edge out a surging Barack Obama for the Democratic nomination.

This also comes less than a month after another public emotional moment for Clinton.

Click here to read more from FOX News embed producer Aaron Bruns.

Clinton was facing criticism in early January for not being human enough, but a widely seen video showed Clinton shedding a tear at a New Hampshire event just before the Jan. 8 election there. It was largely credited with "humanizing" the candidate just before the election she won.

The misty-eyed moment came when Penn Rhodeen, a New Haven public interest lawyer who worked with Clinton as a student, recalled her showing up on his doorstep wearing purple bell-bottoms.

"It was so 1972," he recalled, praising Clinton for her longtime interest in helping children.

"Here is the abiding truth we know -- you have always been a champion for children. Welcome home, dear friend. We are so proud of you," he said.

Clinton at one point wiped her eyes with her hand, but unlike her teary-eyed moment in Portsmouth, N.H., her voice never broke.

Clinton also was showing some of the stress of the campaign trail as she had coughing spell at the Monday event.

Clinton had insisted Sunday night on her plane that she's feeling fine, but a string of long days on the campaign trail have led to a scratchy voice and a cough that comes and goes.

In the middle of Monday's event, it came in a big way. Five aides rushed out of the room to fetch a lozenge as she struggled to control the cough, asking the participants o continue.

Through Monday, she had one more rally scheduled, an appearance on David Letterman's show Monday night, and a 90-minute national town hall after that.

FOX News' Aaron Bruns and The Associated Press contributed to this report.