O’Malley announced his entry to the contest at a rally in his home city of Baltimore.
The former Maryland governor announces his 2016 intentions Saturday.
His campaign is distancing itself from the essay, which discussed violent sexual fantasies.
Hillary Clinton filed a financial disclosure report to the FEC on Friday.
She will be an underdog against the state Attorney General Kamala Harris in a primary.
Julian Hattem 05/08/15 08:34 AM EDT
Unlike other White House hopefuls, Sanders got his website for a song.
His campaign said 99.4 percent of the donations were in the amount of $250 or less.
“Anyone who works 40 hours in a week in America should not be in poverty."
"I agree with Bernie. Focus must be on helping America's middle class," Hillary tweeted.
The Vermont Independent told the AP he was all-in for 2016 on Wednesday.