Michelle Obama hits the campaign trail with Hillary Clinton

As first ladies they could hardly have been more different. But as Democrats looking to fire up female voters, Michelle Obama and Hillary Clinton were firmly bonded on Thursday.

In their first joint appearance on the campaign trail, Obama and Clinton talked up their shared respect, common values and singular goal defeating Republican Donald Trump. They papered over a somewhat rocky history and their vastly different paths through public life.

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WithObama aiming to secure her husband's legacy and Clinton needing to propel women to the polls, the two women sought to celebrate their political marriage of mutual interest, and reassure voters it's real.

"Seriously, is there anyone more inspiring than Michelle Obama?" Clinton asked, as a crowd in Winston-Salem, N.C., answered with cheers. Obama declared the feeling mutual. She referred to Clinton as "my girl" and offered reassurance that her testimony for Clinton is both personal and political.

Since she's emerged as Clinton's headline-grabbing surrogate, people wonder one thing, Obama noted.

"Yes, Hillary Clinton is my friend," she answered.

A tale of two campaigns

8 years ago

Duration 0:34

Michelle Obama talks about the differences between Clinton and Trump

It's a reasonable question.

While Clinton was inthe East Wing, she dived into policy, undertook a massive project and failed under a harsh spotlight. Obama largely steered clear and enjoyed quieter, modest success.

Both Ivy League-trained lawyers with their own careers, Clinton bridled under the stereotypes associated with the office, while Obama declared herself "mom-in-chief." While Clinton held onto her maiden name, her Democratic successor let it be known she preferred the "Mrs." title.

And when her time in the White House was ending, Clinton began plotting her return to Washington. Obama hasn't hidden her readiness to leave. The White House has quickly and repeatedly shot down any talk of Obama continuing in politics.

Acknowledging her reluctance in the political spotlight, she said, "I would not be here" if she didn't believe so strongly Clinton would be a president she would trust.

"I believe with all of my heart that Hillary Clinton will be that president," she said.

Democrats have relished Obama's speeches as high points of the campaign cycle. Her passionate response to Trump's vulgar comments about women brought an emotional resonance that Clinton, who rarely gets personal on the stump, doesn't often deliver.

Get her elected

8 years ago

Duration 0:50

Michelle Obama encourages people to vote for Clinton

Obama's appearances have become a key part of Clinton's effort to fire up women particularly black women, for whom she's a model and a source of pride. Both Clinton and Obama on Thursday revived a line from her DNC speech "When they go low, we go high" turning it into a call and response.

The North Carolina event drew some 11,000 people, according to the fire marshal, one of largest crowds of Clinton's campaign. Trump repeatedly boasts that his crowds are generally larger than hers.

The audience roared as the two women walked onstage, turned to each other and embraced, Obama towering over the shorter candidate.

The new partnership has made for a striking odd couple on a substance, too.

As the president's wife, Obama has largely dodged controversial issues. She's stayed focused on her projects involving healthful eating, exercise, support for military families and education for girls avoiding public opinions on thornier subjects. She's mastered the art of advocacy through popular culture, while in recent years all but ignoring the possibility of policymaking through legislation. She's cultivated a brand built on style, glamour and fashion.

Clinton came in promising, along with her husband, a new kind of partnership in the White House. Hillary Clinton was a veteran of the feminist movement and ready to expand the office of first lady to suit her experience and passion for policy.

That's something Obama and her aides sought to avoid. Asked to cite role models, Obama has named Eleanor Roosevelt and Jacqueline Kennedy.

The Clintons and Obamas themselves have a fraught history, one that includes both spouses. While Barack Obama and Hillary Clinton battled in 2008, Michelle Obama raised questions about her husband's opponent, framing the choice between the two as "about character."

Since then the women have publicly buried the hatchet. They heap praise on each other's work, although there's little sign they've spent time one-on-one.

Comparing how first ladies use the office is especially tricky, historians note. Because the office comes with no set of constitutional duties, it is also a reflection of an individual's style, personality, politics and times.

The differences between Clinton's andObama's tenures speak in some ways to the differences in their generations Clinton representing the first wave of baby boomers eager to push boundaries, while Obama benefited from lessons learned, noted Carl Sferrazza Anthony, a historian at the National First Ladies Library.

"Beneath the surface they both brought a sense of rigour and structure and focus," he said. "They were very objective-oriented."

Those objectives were clearly different, he said.

"I think Michelle Obama may end up being perhaps one of the most influential first ladies when it comes to influence on the American public, whereas Hillary has been one of the most important in terms of achievement in terms of policy."