"Today, I enthusiastically endorse Catherine Pugh for mayor of Baltimore," Carter said. "She has the vision. She has the record, but, most importantly, she has the passion for the people and shares my passion for justice."
Pugh said she planned to consult Carter as an adviser, particularly on criminal justice reform issues.
"Those of you who know Jill Carter know she has the pulse of the community, especially with young people and on justice issues," Pugh said. "I can promise you we will work hand-in-hand especially on justice issues."
Carter particularly warned Baltimoreans against voting for former Mayor Sheila Dixon, who has been leading the polls.
"It's important we go forward and not backward to anyone who has represented the city in the past," Carter said.
The delegate said she would advise Pugh on how best to end the "failed and fake War on Drugs, create jobs and opportunities for everyone, and end lead poisoning and not give lip service to it."
Carter called the two Democrats' philosophies "very similar."
"Sen. Pugh has been an independent thinker," Carter said. "She is not one to put party over people. ... I plan to campaign as hard for Catherine Pugh as I would for myself."
Carter ran for mayor against Dixon in 2007, finishing fourth in a crowded field.
This year's Democratic primary, for which 13 candidates are running, is scheduled for April 26. There are nearly 10 times more Democrats in Baltimore than Republicans.