Judge Stella Tsai ruled that Singletary should be removed from the ballot because the state constitution prohibits anyone convicted of perjury and certain other crimes from serving in public office.
Singletary continues to argue that serving in public office and running for public office are two different things and he should be allowed to run.
"That's my belief and that's what I'm going to keep fighting for," Singletary said. "I think it was an improper ruling, and we will fight it to the next level."
Singletary says he'll take the matter to Commonwealth Court.
"That is his constitutional right, and I'm confident that we will prevail," said attorney Kevin Greenberg, who brought the case pro bono on behalf of a voter, says he pleased with the judge's ruling.
"We were proud to defend the Constitution and the people of Philadelphia, and pleased the judge concluded that Mr. Singletary should not be on the ballot," he said.
Greenberg says if Singletary takes it all the way to the state's highest court, "then it will be up to the Supreme Court to see if they want to follow their previous precedent or change the law."
Election court has had an unusually busy week of challenges to candidates for the May primary, but this stage of the process is wrapping up. That is largely due to the withdrawal of a mass challenge to 30 at-large candidates.
First District Councilman Mark Squilla and former Lt. Gov. Mike Stack survived ballot challenges. However, Stack has withdrawn as a candidate for City Council-at-large.