Four Philadelphia mayors stood side by side Tuesday to back Seventh District Councilwoman Maria Quiñones Sánchez's reelection and denounce her challenger as an embarrassment to the party.

Mayor Nutter and former Mayors William J. Green III, Ed Rendell, and John F. Street hailed Sánchez as an independent thinker and a courageous councilwoman. Green and Street added that they believe she will one day be mayor.

The news conference, outside City Hall, with onlookers gathering to snap photos, was as much about supporting Sánchez as it was condemning her challenger, Manny Morales, whose Facebook page was filled with antigay, and racist posts. Morales has said the page was hacked but has offered no evidence.

Green called the gathering of four mayors to endorse a candidate their party had shunned "unprecedented," and lambasted the ward leaders' endorsement of Morales.

In an interview Tuesday, Morales dismissed the endorsement, calling it "unsurprising."

He noted that not one of the mayors lives in the Seventh District.

"I think Maria, she's like a puppy dog chasing her tail avoiding the issues, she's running out of support in the Seventh. May 19 will show that," Morales said, adding that he believes he has the votes to win.

Sánchez has twice won without party support, unseating Councilman Danny Savage in 2007 and beating him again in 2011. Last week, Savage endorsed Sánchez.

Nutter called on Morales to withdraw. "That's what a real man would do," he said.