In her first public remarks since securing the Democratic presidential nomination, Hillary Clinton accused Donald Trump of wanting to take the United States back to a time of white male privilege.

He cannot be trusted to safeguard gains women have made in work, society and control of their reproductive choices, Clinton said.

"When Donald Trump says, ‘Let’s make America great again,’ that is code for ‘let’s take America backward,’" Clinton said in a celebratory address to the Planned Parenthood Action Fund, a longtime Clinton backer.

"Back to a time when opportunity and dignity were reserved for some, not all," Clinton continued. "Back to the days when abortion was illegal, women had far fewer options, and life for too many women and girls was limited."

The crowd at a Washington hotel cheered as she added, "Well, Donald, those days are over. We are not going to let Donald Trump or anyone else turn back the clock."

Clinton listed some of Trump's past descriptions of women as pigs or dogs, as well as his statement, later revised, that abortion should be criminalized and women should face punishment for having abortions.

“We’re in the middle of a concerted, persistent assault on women’s health across our country," Clinton said. "And we have to ask ourselves and ask everyone we come in contact with: Do we want to put our health, our lives, our futures in Donald Trump’s hands?”

The speech was scheduled before it was clear that Clinton would clinch the nomination this week, when six states including New Jersey and California voted. Clinton has led challenger Sen. Bernie Sanders throughout a long and often contentious primary season, but could not shake him. He has not yet conceded, although Clinton has claimed victory.

Planned Parenthood President Cecile Richards thanked Sanders as she introduced Clinton on Friday, saying he had brought "issues and activists" to the campaign.

Clinton also visited a Washington muffin and coffee shop and met with D.C. Mayor Muriel Bowser. The District of Columbia holds its Democratic primary on Tuesday, the last contest of the calendar.