Republican presidential candidate Mitt Romney got no votes in 59 voting districts in the city of Philadelphia last week on Election Day.

None.

And the unofficial vote tallies have President Barack Obama beating the former Massachusetts governor by a combined vote of 19,605 to 0, The Philadelphia Inquirer reports.

Such unanimous support for Obama in these Philadelphia neighborhoods, primarily in almost exclusively black sections of West and North Philadelphia, stokes fears of fraud, despite little hard evidence, experts say.

"We have always had these dense urban corridors that are extremely Democratic," Jonathan Rodden, a political science professor at Stanford University, told the Inquirer. "It's kind of an urban fact, and you are looking at the extreme end of it in Philadelphia."

While most large cities are politically homogeneous — with as many as 80 percent of voters identifying as Democrats, they also are easier to organize over rural areas where people are more spread apart.

"One reason Democrats can maximize votes in Philadelphia is that it's very easy to knock on every door," Sasha Issenberg, author of “The Victory Lab: The Secret Science of Winning Campaigns,” told the Inquirer.

Steve Miskin, a GOP spokesman in the Pennsylvania House of Representatives, which has approved a voter identification law that has not yet taken effect, told the Inquirer, "We believe we need to continue ensuring the integrity of the ballot."

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