How Hillary Clinton Got Her Groove Back

PHOTO: Secretary of Housing and Urban Development Secretary Julian Castro introduces Democratic presidential hopeful Hillary Clinton at a "Latinos for Hillary" grassroots event, Oct. 15, 2015 in San Antonio, Texas. PlayErich Schlegel/Getty Images
WATCH First Democratic Presidential Debate In A Minute

When Hillary Clinton walked off the debate stage on Tuesday night in Las Vegas, she knew she did well -- she just didn’t know how well.

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Then one of her aides tossed her a phone.

Booming from the speaker were loud cheers coming from her campaign headquarters in Brooklyn. It was at that moment, according to an aide who was with her, that it all sank in.

"I love you all!" Clinton exclaimed, as she made her way to a debate watch party for her supporters at the Wynn hotel. "I’ll talk to you later! I love you!"

And for the rest of the week, as she traveled from Nevada to Texas to New Hampshire to Alabama, Clinton has seemed like a new woman. Not only did her well-reviewed debate performance shut down many of her doubters, but the Democratic presidential candidate also seems to have gotten her groove back.

Perhaps it is a winner’s high, but the woman who has been plagued for months by headlines about an e-mail scandal and her main opponent's rising poll numbers, now seems invigorated and refreshed -- smiling, cracking jokes, and loving the rope-line.

At the end of her rally in San Antonio on Thursday, Clinton made her usual rounds glad-handing and taking selfies with supporters. But at the moment the Secret Service appeared ready to usher her out a side exit, Clinton instead was ready for one more round, returning to the rope line to meet with a new crowd that had formed.

All of a sudden, Clinton seems to be having fun on the campaign trail. And, in the days since the debate, the energy at her events (which have, at times, seemed anemic compared to the massive gatherings held by Vermont Sen. Bernie Sanders) has picked up, too.

Over the past three days, the campaign hosted two large rallies: One in Las Vegas that opened with performances by a mariachi band and Mexican dancers. And another in San Antonio where her team switched up Clinton’s usual campaign playlist and blasted Selena.

In Texas, where she received the endorsement of U.S. Housing Secretary Julian Castro (a potential running mate if Clinton wins the nomination), the audience chanted "Hillary! Hillary!" several times during her remarks.

Clinton’s aides are clearly soaking it all in and, at the same time, looking for ways to leverage the moment.

As they gathered near the casino of the Wynn hotel in Las Vegas for a late-night, celebratory dinner after the debate, one aide observed, "it feels like opposite day," citing a Politico headline that read "Clinton Crushes It."

The campaign also believes the debate revealed one of Sanders' weak spots: Gun control -- one of the only issues where Clinton stands to the left of her Democratic rival. It was no accident that gun control was the topic of two of her campaign events this week at which she took subtle swipes at Sanders for his comment during the debate that "all the shouting in the world" will not keep guns out of the wrong hands.

The question now is how long Clinton's post-debate afterglow will last. In the coming week she faces two potential game-changing story lines. Her sure-to-be-contentious testimony before a House committee investigating the terrorist attacks in Benghazi as well as a potential announcement from Vice President Joe Biden about whether he intends to challenge her for the Democratic presidential nomination.

But for a few days, at least, Clinton seems to have found her footing.

When asked by a reporter as she worked the crowd in San Antonio if she was having a good day, Clinton simply smiled and gave one big, hearty thumbs up.