Similarly, Mrs. Clinton’s occasional missteps, combined with attacks on her trustworthiness, have distorted perceptions of her character. She is one of the most tenacious politicians of her generation, whose willingness to study and correct course is rare in an age of unyielding partisanship. As first lady, she rebounded from professional setbacks and personal trials with astounding resilience. Over eight years in the Senate and four as secretary of state, she built a reputation for grit and bipartisan collaboration. She displayed a command of policy and diplomatic nuance and an ability to listen to constituents and colleagues that are all too exceptional in Washington.

Mrs. Clinton’s record of service to children, women and families has spanned her adult life. One of her boldest acts as first lady was her 1995 speech in Beijing declaring that women’s rights are human rights. After a failed attempt to overhaul the nation’s health care system, she threw her support behind legislation to establish the Children’s Health Insurance Program, which now covers more than eight million lower-income young people. This year, she rallied mothers of gun-violence victims to join her in demanding comprehensive background checks for gun buyers and tighter reins on gun sales.

After opposing driver’s licenses for undocumented immigrants during the 2008 campaign, she now vows to push for comprehensive immigration legislation as president and to use executive power to protect law-abiding undocumented people from deportation and cruel detention. Some may dismiss her shift as opportunistic, but we credit her for arriving at the right position.

Mrs. Clinton and her team have produced detailed proposals on crime, policing and race relations, debt-free college and small-business incentives, climate change and affordable broadband. Most of these proposals would benefit from further elaboration on how to pay for them, beyond taxing the wealthiest Americans. They would also depend on passage by Congress.

That means that, to enact her agenda, Mrs. Clinton would need to find common ground with a destabilized Republican Party, whose unifying goal in Congress would be to discredit her. Despite her political scars, she has shown an unusual capacity to reach across the aisle.

When Mrs. Clinton was sworn in as a senator from New York in 2001, Republican leaders warned their caucus not to do anything that might make her look good. Yet as a member of the Senate Armed Services Committee, she earned the respect of Republicans like Senator John McCain with her determination to master intricate military matters.

Her most lasting achievements as a senator include a federal fund for long-term health monitoring of 9/11 first responders, an expansion of military benefits to cover reservists and the National Guard, and a law requiring drug companies to improve the safety of their medications for children.