He apologized and said that he was in the photo.
Kamala Harris (D-CA) and former Housing and Urban Development Secretary Julian Castro were the first declared candidates to call for Northam to step down. One of them was "Coonman", a racial slur.
The Ku Klux Klan is one of the oldest and most infamous hate groups in the U.S., and has targeted African Americans, Jews, Catholics and immigrants, according to the Southern Poverty Law Center, which tracks hate groups. The legacy of slavery, racism and Jim Crow has been an albatross around the necks of African Americans for over 400 years.
Northam won a tight gubernatorial race in 2017 over Republican contender Ed Gillespie, who he accused of racism and bigotry for supporting Trump's immigration reform agenda. "An apology now isn't enough. Instead, it's about the things you do when you think no one is watching".
Booker, who declared his candidacy for president earlier on Friday, also called for Northram's resignation.
Democratic party leaders must follow Congressman Ro Khanna (D-CA) and ask Northam to step down, making way for current Lt. Governor Justin Fairfax to take his place.
Moving forward, she said Virginians would work together to get through this. "If Governor Northam appeared in blackface or dressed in a KKK robe, he should resign immediately". Virginia state Senate Democrats did the same.
The calls extended beyond the state.
Though his spokeswoman, Northam said his words were taken out of context, and were only meant to apply if a woman in dire circumstances went into labor.
Democratic Senator Elizabeth Warren, who is considering a presidential run in 2020, also called for Mr Northam to resign.
However, Northam's released statement on Friday insinuated he was not ready to resign over the photo.
A small number of protesters stood outside the governor's mansion Saturday to demand his resignation.
Ralph Northam apologized on Friday for a racist photo in which he appeared more than 30 years ago, but said he did not intend to heed calls to resign from both Republicans and prominent fellow Democrats, including several presidential hopefuls. The governor has indicated he is one of the people in the photograph but has not said which one.
"While his career has been marked by service to children, soldiers, and constituents, I can not condone the actions from his past that, at the very least, suggest a comfort with Virginia's darker history of white supremacy, racial stereotyping, and intimidation", Fairfax said of the governor.
"I understand how this decision shakes Virginians' faith in that commitment".
L. Douglas Wilder, who was the first elected black Governor of a US state when he led Virginia from 1990 to 1994, didn't call for Northam to resign but said on Twitter: "It has never been right, in Virginia, nor anywhere else to participate in or condone such mockery or insensitive behavior and for that Gov. Northam should be criticized".
"I am simply asking for the opportunity to demonstrate beyond a shadow of a doubt that the person I was is not the man I am today", Northam said. "I am deeply sorry". However, this photo just made it to the world today.
"That's hard for me to swallow".