Four years ago, Michelle Obama's convention speech was designed in part to mend her own image "I love this country" she made a point of saying.
In the White House, she has focused on helping military families and encouraging exercise and healthy diets for children.
Now a popular first lady, she worked to shift her public approval to her husband with a warm, positive speech that spent little time on the weak economy and instead sought to remind voters of Obama's personal virtues they seemed to embrace four years ago.
"I have seen firsthand that being president doesn't change who you are. No, it reveals who you are," she said.
The convention's first night featured people telling how their own lives have been affected by Obama's policies, including the health care overhaul and the endorsement of same-sex marriage. Michelle Obama spoke of the reverse: how her husband's life and values had affected his policy.
She reminisced about the early days of their marriage, when she said the couple's monthly student loan bills were higher than their mortgage payment. "We were so young, so in love, and so in debt," she said. He was "a kindred spirit," she said.
"Barack and I were both raised by families who didn't have much in the way of money or material possessions but who had given us something far more valuable their unconditional love, their unflinching sacrifice, and the chance to go places they had never imagined for themselves."
Some of her speech echoed the one Ann Romney gave last week in Tampa: a portrait of a young couple in love coping with work-family stress. "Date night for Barack and me was either dinner or a movie, because as an exhausted mom, I couldn't stay awake for both," she said. Romney invoked the ironing board turned into a dining table; the first lady described a coffee table her husband found in the trash.
Her story of growing up working-class in Chicago, the daughter of a water plant worker who suffered from multiple sclerosis, and her husband's of being raised by a single mother and his grandparents may be familiar to voters from 2008. Yet it provided an implicit contrast to the middle-class-turning-into-wealth story of the Romneys.
The first lady also seemed to be rebutting GOP efforts to portray Democrats as resenting wealth and success.
"Our families ... didn't begrudge anyone else's success or care that others had much more than they did in fact, they admired it," she said. But she also praised her husband for skipping a lucrative job to work in a struggling neighborhood. "For Barack, success isn't about how much money you make, it's about the difference you make in people's lives," another subtle jab at the Romneys' wealth.
She cast Obama as steady and persistent "when we're worried that the bill won't pass, and it seems like all is lost Barack never lets himself get distracted by the chatter and the noise. ... He just keeps getting up and moving forward ... with patience and wisdom, and courage and grace."
And she asked voters to stay the course. "We are playing a long game here. Change is hard, and change is slow, and it never happens all at once. But eventually we get there; we always do."
Poll • Americans say they're better off since Obama even as slump impact lasts
The typical middle-class family has less money than when President Barack Obama entered the White House. Even so, in more cases than not, Americans still feel better off.
When asked how they felt about their circumstances compared with the start of the Obama administration, 45 percent of Americans said better off versus who said 36 percent worse off, according to a Bloomberg National poll taken June 15-18. The rest said their circumstances were about the same or they weren't sure.