The former president was at her side to help put the best face on her third-place finish Thursday in Iowa, and he was beside her again when dawn broke the next day on the final push to Tuesday's New Hampshire primary.
"I was never more proud of Hillary in all the days we've been together and all the days of this campaign than when she gave that speech in Iowa," the ex-president told New Hampshire voters.
No loyal spouse would say any less.
But with Bill Clinton, it's a far more complicated dynamic than simply that of the supportive husband.
He is at once a huge part of her political bona fides and a living reminder of days gone by.
The old days aren't necessarily a bad thing to Democratic primary voters
- the former president has attracted large and enthusiastic crowds as he campaigns for his wife.
"It's hard to detect any signs of Clinton fatigue in a Democratic primary," said Democratic strategist Donna Brazile.
But, by the same token, the profile of Bill Clinton isn't necessarily an ideal backdrop for a campaign in which change is emerging as the coin of the realm and Hillary Clinton is swapping slogans by the week.
"Senator Clinton needs to make this campaign about her vision, her plans and her strengths," says Brazile.
The candidate's husband, meanwhile, tends to ramble on about himself.
A survey of Democratic caucus-goers in Iowa found that by a margin of 52 percent to 20 percent, more Democrats said they wanted a candidate who could bring about change than said they were seeking a candidate with the proper experience. And Barack Obama, who won decisively in Iowa, was the overwhelming winner among voters looking for change
- he got 51 percent of their votes, compared with 19 percent for Clinton.
Clinton tries to meld two qualities - change and experience - by offering herself as a president "who won't just call for change, or a president who won't just demand change, but a president who will produce change, just like I've been doing for 35 years."
For all of that, though, "in some ways her campaign is based on nostalgia, which is not very often a good theme to orchestrate in a political campaign," said Rutgers political scientist Ross Baker. "In a sense that's what Bob Dole was doing in 1996 when he ran against Bill Clinton and evoked the Greatest Generation. It was Fleetwood Mac vs. the Andrews Sisters."